OTHER COMPASSES

The museum displays here its own exhibits as well as pictures kindly transmitted by visitors (see copyright mentions).

JEWELERY
- Inserts, hat pin, necklace pendants, city coat-of-arms, charms, postcard, medals etc.

OBJECTS FOR EVERYDAY USE
- Antiques: paperweight, collapsible tumbler, opera glasses, tobacco boxes, compendiums (weather stations)
- Modern: toys, key ring, pocket knife, multifunction instrument,
- Eletr. measuring instr.: galvanometer, magnetic bar and probe
- Photographers compasses (DECOUDUN, BERRY, Houlliot, WATKINS, PLAUBEL, etc.)
- WATCHES

- POSTCARD -

Lovers' Postcard



Click on the picture for an enlarged view.

France, early 20th c.
(stamp value: 5 centimes)
 Description / explanation
Head streamer : The Language of the Compass
Each cardinal point has a meaning, starting from the cool North and getting gradually hotter towards South.
West = Friendship, SW = Tenderness, SE = Love,
South = Passionate love.
(see also spiritualism)

Bottom line:
Show your feelings by painting the corresponding arrow.

Medals



Click on the picture for an enlarged view

Description / explanation
This medal was probably made for the winner of an orienteering competition. Name, date and location can be engraved on the obverse.

UNEG: Union Nationale des Évadés de Guerre (National Association of Escaped Prisoners of War)
Click on the pictures for enlarged views


Back side: fitting for button-hole
Designer: Courtois, Paris 		These medals feature a typical French Army marching compass called boussole directrice. Its marching course arrow points to the word FRANCE (or the abbrev. UNEG) and an opening in the barbed wire fence symbolizing the escape from the next country located east, i.e. Germany.

Compare to the Médaille des Évadés (Medal for escaped prisoners of war 1939 - 1945) which looks entirely different.
NOTE: The needle's north end which is pointing to about 45° East corresponds in fact to a user located at some place in northern Alaska... Magnetic North in the 1940's was located about 5° West in Europe!
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- JEWELRY -

Most items on this page contain a tiny insert compass. One of the most important manufacturer in the 19th and early 20th century was the French maker HOULLIOT. We have copies of numerous documents like lists of clients in the whole world, a price list dated 1883 and a bill form of a manufacturer of fashion compasses (1890s). The table below disolays most of the items in the price list. Some of them are transparent (see-through, called "deux glaces" in the list) like the one with a ship's anchor-shaped needle and other featured a thermometer in the other side (pic. at r., click on image for view of both sides).
Go to the museum's shop for more details.



Hat (or tie) pin
England, late 19th c.

Technical Data
- Diameter: 10 mm
- Length: 75 mm
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CHARMS

Necklace pendant in fob watch shape - France, late 19th c.
Possibly from the city of Draguignan which has a dragon in its coat-of-arms

Technical Data
- Diameter: 22 mm
- Depth: 5 mm
- Weight (with chain): 175 gr

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Pendant in fob watch shape
 France, late 19th c.
 Obverse : mistletoe

 Technical Data
- Material: silver-coated metal
- Diameter: c.1 " / 23 mm
- Depth: 5 mm
- Poids : 3 gr
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Necklace compass pendant -
France, late 19th c.

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 Technical Data
- Diameter: 21 mm
- Depth: 10 mm
- Weight: 10 g

Obverse design: Britanny's coat of arms
- a Duke's crown (duchy of Britanny)
- ermine tips as a background
- an ermine - but walking against the normal direction (from right to left) on coats-of-arms.
City coat-of-arms - France, late 19th C.



Paray-le-Monial (Pic. courtesy D. Beaudry)
Roscoff 		Header of a French instruments maker's invoice.
His specialty was fashion jewelery.
He was a client of HOULLIOT (1890s).



(Click on image for enlarged view)
Compass Pendant - Germany, late 19th c.



Charm for bracelet

Space for engraving one's own coat of arms
The chain is composed of double rings made of elephant hair (?)
Click on picture for enlarged view.
Technical Data
- Dimensions: 19 x 19 mm
- Depth: 6 mm
- Weight: ? g
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Charm (Germany?), late 19th c.
   

This tiny compass is concealed inside a reproduction of a helmet of the German Jäger zu Pferd cavalry regiment (Mounted Chasseurs). Their motto:
MIT GOTT FÜR KAISER UND VATERLAND
(with God for Emperor and Homeland)
is punched around the insignia where the word KAISER is abbreviated "K/R".

These words are from a traditional song:
"Kredenze den Becher uns Vater Rhein
stimm ein in das fröhliche Klingen
heut wollen beim deutschen Kaiserwein
den deutschen Trinkspruch wir bringen
Trag ihn von den Alpen zum Nordseestrand
mit Gott für Kaiser und Vaterland"		 The photograph below shows the first words "MIT GOTT".



Technical Data
- Material: silver
- Compass diam.: 10 mm
- Height: 25 mm
- Length: 25 mm
- Breadth: 15 mm
- Weight: 5 gr
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ANCHOR




(Click on the picture for an enlarged view of the dial)		 Fob watch compass with anchor design
Origin: England, late 19th c.


Technical Data
- Compass diameter: 30 mm
- Depth: 8 mm
- Length (with chain): 170 mm
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CAPSTAN

Capstan-shaped silver charm. A piece of rope is wound around the capstan. It is flanked by two elements looking like belaying pins. Logically, they should represent the bars used to rotate the capstan. The transverse boom (T-bar) was the attachment device for a pocket watch chain in a button hole.

Belaying pin
(Picture Yannick Le Bris)

Click for enlarged view of silver hallmarks		 Technical Data
- Compass dia.: 13mm
- Depth: 10mm
- Height: 40mm

The stamps at the base indicate:
- the silversmith's initials (J.A),
- the city of Birmingham in England (anchor),
- the year it was made : 1881 (lower case gothic g).
NOTE: the anchor should have been shown upright. This is usually the position of the anchor for gold jewels. The transverse boom bears the words written REAL SILVER.
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Charm - England, early 20th c.

Technical Data
- Compass dimensions
- Diameter: .. mm
 The chain bears the maker's punch (C.W) of Charles Wilkes (Mott Street, Birmingham).
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 Compendiums (incl. thermometer and barometer)

Antique gold compass with a bloodstone, a rare Victorian item. It opens to a compass/centigrade thermometer and a photo locket.
It features flower chasing on one side and a bloodstone disc on the other side. A walking gold lion is attached at the top.



Click on picture for enlarged view.
(The Online Compass Museum is not the owner of this exhibit - Pictures courtesy BELFOR ANTIQUES)		 Technical Data
- Material: gold
- Diameter: 7⁄8 "
- Depth: 3⁄8 "
- Weight: 17,9 gr
- England 1880

BELFOR ANTIQUES added the following information:
9K gold tested with 9K acid.
The bloodstone was tested with refractive index liquid.
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Victorian miniature cased compass and thermometer		 Technical Data
- Dimensions: 29 x 18 mm
The case is made from mother of pearl with brass mounts and the compass and thermometer are either side when open. The case closes on a little catch.

Pictures by courtesy of Ebay vendor Flikmywick
Click on the pictures for enlarged views.

WIND VANES


Foldable windvane stowed under a glass cover
Pictures by courtesy of Andrew Stewart
(click on the images for enlarged views)
 Thermometer on the rear side. Maker (unknown): G.R.
Dia.: c. 2 ¼ " / 55 mm


Click on the image for an enlarged view
 Technical Data
- Folding windvane above a floating dial
- Cardinal points: German
- Dia.: 55 mm
- Height (erected): 40 mm
- Weight: 97 g
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- OBJECTS FOR EVERYDAY USE -

Toys

Toy bought in Bulgaria, maybe also built there.The compass is not a magnetic instrument. Its card's high-speed rotation is proportional to the wheels' rotation on the ground and the two tiny balls running on the card sound like the turbine noise of the engine!


Model Feniks 5 (Phoenix 5)
Click on the image for an enlarged view
The two tiny balls in the compass case
 Technical Data
- Material: metal (coloured part), plastic (black part)
- Compass dia: 1 inch / 25 mm
- Aircraft dim. (LxB): 4 3⁄16 x 3 1⁄2  inch
- Landing gear: (photo : view of under-carriage)
- Aicraft model: MiG-29 or Sukhoi-35
- Made in Bulgaria ?

Paperweight, England, late 19th C.



(Picture Jaypee -  priv. coll.)		 Technical Data
- Material: marble
- Diameter: 60 mm
- Height: 32 mm
- Weight: gr?
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Collapsible tumbler, England, late 19th C.
Technical Data
- Material: aluminium
- Diameter: 70 mm
- Height (tumbler): 80 mm
- Depth (case closed): 25 mm / 1 inch
- Weight: 45 g
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Opera glasses - France, late 19th c.

(see also in the category SUNDIALS our opera glass with sundial)




Two opera glasses: each one is equipped with a compass on one side and a mirror on the other. Metallic structure, telescopic extension for focussing. Cardinal points in English (top) and French (above)

Technical Data
- Diameter front lenses: 45 mm
- Diameter rear lenses: 18 mm
- Breadth open, front lenses: 110 mm
- Breadth open, rear lenses: 85 mm
- Length, fully extended: 105 mm
- Length, folded: 85 mm
- Weight: 100 g
(click on picture for enlarged view of flyer in English and French)
Bakelite, black, rough surface


Technical Data
- The overall dimensions of all three vary only very slightly.
- Weight: about 20-30 g
- Focussing by means of feathered sliding bars
- Dial: Cardinal points in English, divisions 360 degrees, clockwise
- Marking: MADE IN FRANCE
- Each lense fits neatly in a frame on the main stem.		 Bakelite, ivory imitation
(this exhibit was kindly loaned by Mrs Sue Cubitt)



Technical Data
- Dial marking: BAVARIA
- Divisions: Four 90 degrees quadrants

(Click on images for detailed view of dials)		 Bakelite, amber imitation



Technical Data
- Hexagonal lense frames
- Screw actuated focussing extension
- Dial: French cardinal points, compass rose with divisions but no graduation
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Tobacco Boxes

Small Compass on a silver plated Chewing Tobacco Box - USA, end 1800s

Picture on the lid: the compass fills the whole body of a sitting frog holding three tobacco leaves on its left arm and three other unidentified leaves on its right arm. Note: in fact, they look like the rose leaves on the box' underside, which would match the product's designation: "ROSE LEAF Chewing tobacco". The frog's hands are on both sides of its mouth.
Near its right foot are two mushrooms (a big one and a small one).
In the background, a two-masted sailboat (schooner or ketch) with the letter "L" (for the tobacco manufacturer's name LORILLARD) on its aft main sail is sailing towards the box' upper left corner on the ocean's horizon line and a sun (with eyes and eyebrows) is setting behind the horizon in the upper right corner.
Two flowering plants (probably stylised tobacco) are standing at the lid's left border line: a tall one with five leaves and a short one with only three leaves.



Text at the lower border line (1 mm high letters):
SOMERS BROS. Brooklyn, N.Y. - Patented Sept. 24th and Nov. 18th 1878 (last digit unsure)
Click on pictures for enlarged view.

Picture at the box' underside: a heraldic rose between six leaves (three on each side). The text parts ("P. LORILLARD & Co's ROSE LEAF Chewing tobacco") are written on a curled strip.		 Technical Data
- Dimensions: 88 x 56 x 16 mm
- Weight: 54 g
- Cardinal points in English

Picture of patent for objects with a sundial and a compass (dated Nov. 1856)

"Utilisation of solar system and compass on tobacco boxes, purses, walking sticks, jewels etc."
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Small Compass on a Snuff Tobacco Box - end 19th c.

Description: Small snuff tobacco box made of reddish-brown horn and bone parts. The hinge fits perfectly. The compass needle turns freely and finds North.


Click on pictures for enlarged view.		 Technical Data
- Dimensions: 68 x 35 x 66 mm
- Weight: 30 g
- Cardinal points in French (or any other Roman language)

Patent: see item above
Compass probably made by HOULLIOT
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WATCHES

Antique Pocket Watches

Pocket watch, Switzerland (?), end 19th c. Antique pocket watch - Belonged to a German captain
Click on the pictures for enlarged views - Photos Jaypee - Priv. coll.





Technical Data
- Material: steel, silver and gold plated
- Diameter:
- Depth:
- Weight: gr
-Markings inside the lid:
- top: AT
- bottom: 39497


Description: The rear face displays a boat inside a circle with eight corners. Three leaves are displayed in the top and bottom corners.
The boat is a paddle steamer rigged like a two-masted schooner with three sails: fock and square rig fore, mainsail aft. Midship are the chimney and the paddle.
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This watch-compass system designed by the French Capitaine Charles Adolphe Henri VINCENT (living in Reims) is described in a comprehensive manual (donated to Compassipedia by Mr Collignon - check this manufacturer's name) written in 1909. This instrumenrt was a watch but possesed in addition a magnetic compass, a sighting device (alhidades) and a style (for the sundial function) stowed in the compass body when not in use. The watch face was made of émail and devided in three blue zones (indigo, cobalt, light blue).  Il comportait un rebord argenté (limbes gradués) et une alidade à pinnules escamotables (cran de mire et guidon) fixée sur une lunette. Ce système a été breveté en Suisse en mars 1909 (n° 46.732, fig. : cliquer ICI) mais il y est seulement question d'une montre-boussole de gousset. Les alidades ne sont évoquées que dans le texte et il n'est pas fait mention du style enfichable.

Picture at right: user instruction (31 p. photocopies available)

Modern Wrist Watches

There are several types of wrist watches with an integrated compass: some have a separate capsule underneath that can be observed when flipping up the watch's case (IWC or Breitling Military). Some have a swivelling case with the compass being on the opposite face (OCTO).
In other models, the compass needle rotates around the same axis than the watch's hands (TIMEX).


 Technical Data
- Diameter: ... mm
- Depth: ... mm
- Weight: ... gr

Compass with transparent capsule. The bottom glass features a short ruler (20 mm) and some lines and dots, whose meaning is not obvious
The watch case can swivel in its frame. On the rear face is a mirror.


INCURSORE is the Italian word for intruder

(Pictures scourtesy Breitlinglounge.de)

(Click on the picture for adetailed view)
 Breitling DPW Compass Military - Incursore

Printed on the glass capsule bottom:
- 20 mm ruler
- Network of lines (unknown function)

Read more about this item on the website www.Breitlinglounge.de 



(Pictures courtesy Breitlinglounge.de)

The compass capsule can be extracted.
(Click on the picture for a detailed view)
 Breitling Colt Military Diver Compass.

Extremely rare item. Only 800 were produced and used under very severe conditions. Very few still exist.
Read more about this item on the website www.Breitlinglounge.de 

Technical Data
- Production year: ca. 1985
- Casing: Steel
- Diameter: 38 mm
- Depth: 15 mm



(Pictures autoni-2007)
(Click on the picture for a detailed view)
 Manufacturer: IWC Porsche Design

Technical Data
- Production year: ca. 1980?
- Casing: Steel
- Diameter: .. mm
- Depth: .. mm

This watch was also available with a moon phase display (on 12 hours).


(Pictures by courtesy of Proworth)


(Click on the picture for a detailed view) 		Manufacturer: Paul Picot

Technical Data
- Production year: ?
- Casing: Steel
- Diameter: .. mm
- Depth: .. mm
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(Click on pictures
for detailed views)

(Pictures courtesy
Olivier / Corsaire75)
Manufacturer: OCTO - Model name SKYNAVY
Read more about OCTO on the website www.forumamontre.com
(in French and English language)
Technical Data
Very rare combined instrument (revolving watch / compass)
- Production year: 1960's
- Casing: Steel
- Diameter: 38 mm
- Depth: 17 mm
- Weight: .. gr


(Click on pictures for detailed views)
(Pictures courtesy Olivier / Corsaire75)
Manufacturer: CYMA

Technical data
- Cardinal points in French and Engl.
- Casing: silver, signed Huguenin Frères
- Calibre Cyma,13 lignes - 7, réf. 370 Savonette, 371 Lépine.





The lateral quick release screw

(Click on the pictures
for detailed views)
 Manufacturer: DAVOSA (Switzerland)

Technical data
Horizontally swivelling watch case.
- Production year: 1990?
- Casing: acier
- Diameter: 50 mm
- Depth: 18 mm
- Weight: 130 g
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 Unknown Swiss maker
Probably 1st half of 20th C.
A tiny magnetic needle with red north half sits on the hands' axis.




(Click on the image for an enlarged view)

Hour Angle Watches
Although these watches don't feature any magnetic compass we thought it would be worth displaying them here.



(Click on the images for enlarged views)		 A. Lange & Söhne
Projects of watch for the Luftwaffe during IIIrd Reich's rearmament endeavour. The German Imperial Air Ministry (RLM) had laid down that all watches had to feature hours and angle values. The minutes represent each 4 degrees (360 / 60). The seconds hand rotates a full turn in 4 min., the minutes hand in 4 hours (60°) and the hours hand in 24 h (360°).
Description (see pic. at left):

Pictures and description by courtesy of Konrad Knirim published on his website  Navigational timepieces of the Luftwaffe.
(See also our LINKS)


(Click on pictures for detailed views)

User instructions
(copies available)
LONGINES LINDBERGH

This is a down-sized replica of the navigation system designed by Col. Charles Lindbergh to calculate the longitude. It is to be used together with a radio set giving the exact Greenwich Mean Time, a nautical almanach and a sextant.

For more details visit Longines' own website.
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Watches showing the direction of Mecca

(Click on images for enlarged views)
 ARABIC / ISLAM / QIBLA

Both rings (the outer white one and the inner green one) can be rotated via the two side crowns.
Click HERE for a transcription in English of the cities and countries' names indicated on the dial.
(Compassipedia thanks THE BOREAL ARROW for the friendly help and translation).

See also the section Religion / Islam
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Multifunction Instrument

PROFILE - MULTIOPTIC: Little instrument with numerous functionalities for young explorers.
France (?) 2nd half of 20th c.





Click on the pictures for enlarged views.

Users' instructions
(French, copies can be ordered)		 Technical Data
- Dimensions: 4 1/4 x 2 1/8 in. (108 x 55 x 55mm)
- Weight: 3 oz. (100gr)
- Integrated functionalities:
Compass, sundial, mirror, magnifying glasses (spy glass, microscope etc.)
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GALVANOMETER

It looks like a compass and reacts like one, but  it ain't a compass.

Definition (for more technical details, see WIKIPEDIA)
A galvanometer is an instrument designed for detecting and measuring electric currents. It is an analog transducer that produces a rotary deflection of some type of pointer in response to electric current flowing through its coil.
Early galvanometers consisted of a wooden compass capsule, a simple coil made of insulated copper wire and two cable terminals. The coil wire was wrapped like a box around the magnetic needle's axis (passing through four holes, see pictures below). Each wire end was connected to one of the brass terminals basis. To measure a circuit' s current, one connected two sections of it to each terminal by means of measuring wire sections.



Click for enlarged view.
 Technical Data
- Diameter: 105 mm
- Depth: 28 mm
- Weight: 120 gr
- Wooden capsule, dial made of cardboard with quadrants divisions (zero at N and S, a star at 90°)
- Marking: Schutzmarke = registered design
- Threefold coil

Pictures: Early galvanometer manufactured by a company called J.O.Z. It's logo was a bearded man with a soft cap holding in his right hand a lance-shaped object (lightning?) and a big ring in his left hand (Germany, late 19th c.).

History
The deflection of a magnetic compass needle by current in a wire was first described by the Danish physicist Hans Christian Ørsted (Oersted) in 1820. The phenomenon was studied both for its own sake and as a means of measuring electrical current. The earliest galvanometer was reported by Johann Schweigger at the University of Halle (Germany) on 16 September 1820. André-Marie Ampère also contributed to its development. Early designs increased the effect of the magnetic field due to the current by using multiple turns of wire; the instruments were at first called 'multipliers' due to this common design feature. The term 'galvanometer', in common use by 1836, was derived from the surname of Italian electricity researcher Luigi Galvani. Originally the instruments relied on the Earth's magnetic field to provide the restoring force for the compass needle; these were called 'tangent' galvanometers and had to be oriented before use.
(See also the French website boussoles des tangentes).
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Magnetic Bar & Probe

Magnetic Bar

Pictures courtesy Y. Stern		 This tool is a magnetic probe in its most simple form. It is however extremely sensitive and used in laboratories for electrical measurements or by geologists for determining ore quality. It comprises a solid magnetic bar, marked N at one end, which is placed on a pivot. These parts can be assembled and stowed in a hollow wooden case. Before any measurement can be performed, the bar must have reached a stable position relative to Magnetic North. The magnetic fields either created by the current running inside an electrical equipement or existing naturally in a piece of ore will cause the bar to be deflected. Examples of measurements tasks a laboratory.


Picture above: the tool assembled and the bar (images not to scale)

The instrument below was patented in 1893 by Alexandre WEBER and the Swiss company Fabrique d'Ebauches de Sonceboz (FES, created in 1849) which supplied compass cases for many manufacturers. In fact, it is a small dip-needle (inclination) compass but it can be used in any position to detect magnetic fields in electrical devices like live lines.


The manufacturer's abbreviated name: FES

Swiss Patent no.


Patent (excerpt)

(Click on the images for enlarged views)
 Magnetic Probe

Technical Data
- Diam.: 45 mm
- Length: 67 mm
- Weight: 45 gr
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Photographers light measuring compasses

1 - J. Decoudun was a French engineer, photographer and inventor who lived in the late 19th c. He invented among other systems this device which he called boussole du photographe pour excursions. It was used to determine the sun's height and hence the resulting luminosity. The description (below right) explains the example shown on the drawing (center): orientating the compass with the attachment ring pointing to the subject/landscape, the latter will face the sun at 6 p.m. while he/it will be receiving light from the side in the early afternoon.
2 - A. Berry was an optician in Turin (Italy). We don't know whether he invented this instrument or only was a retailer.
3 - Houlliot (France), unknown UK mfr.
4 - A. Watkins: expose meter and Bee-meter
5 - Plaubel & Co.
6 - Graff: Light angle indicator (Lichtwinkelanzeiger)
7 - Pathé Solar (Continsouza)
8 - Orient Compass



Export version :
P.M. (past midday - in French: "soir")
(Pic. sent by a visitor - priv. coll.) 		DECOUDUN model 1


French version: MATIN = a.m.

Picture courtesy Simon A. Spaans
(Click for enlarged view)
Description and instructions
Pic. at left: excerpt from Frédéric DILLAYE's book "La théorie, pratique et l'art en photographie", 1891, La Librairie Illustrée, Paris)
Right: advert. 1890



(Click for enlarged views)

Technical Data
- Diameter: 30 mm
- Depth: 10 mm
- Scale : 6 -12 a.m., 1 - 6 p.m.

User Instruction (French)


(Picture courtesy Simon A. Spaans - Click for enlarged view)
 DECOUDUN  PHOTO COMPAS (model 2)

Technical  data
- Dimensions: 50 x 45 x 14 mm
- Around 1907
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(Pic. Jaypee - private coll.)
(Click on images for enlarged view)
A. BERRY
Former Italian manufacturer, located in Torino, via Roma


Technical Data
- Diameter: 45 mm
- Scale: 4-20 i.e. 4 a.m. - 8 p.m.
- User instruction on reverse side
French system (Houillot ?)
South: 12
North: 6


Picture courtesy M. Collignon
British system (no manufacturer name) with inverted figures:
South: 6
North: 12


Picture courtesy Godblessthismess
 Strange and apparently illogical system. The disk is divided into 12 hours but the scale doesn't match the sun's positions during the day.

Description and user instr. according to Franz Winterer:

Picture courtesy Simon A. Spaans
(Click for enlarged view)		 A. WATKINS
(with Negretti & Zambra compass)

 Technical Data
- Diameter: 45 mm
- Length: 70 mm
- Around 1900

Markings (pict. at r.) :
Watkins Exposure Meter Patent  Sole Makers R. Field & Co Birmingham

A. WATKINS:  "BEE meter"



Picture courtesy anonym. priv. coll.
(Click for enlarged view)		 Technical Data
- Diameter: ... mm
- Height: ... mm
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PATHE SOLAR

Pictures courtesy Thomas Meyer
(Click for enlarged view)		 Technical Data
- Dimensions: 75 x 75 x 36 mm
- The company CONTINSOUZA was created 1909

Pictures courtesy Simon A. Spaans
(Click for enlarged view)		 PLAUBEL & Co. Peco-Actinometer

 Technical Data
- Diameter: 55 mm
- Height: 14 mm
- Around 1908

Former German manufacturer located in Frankfurt-on- the-Main
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Pictures courtesy Thomas Meyer
(Click for enlarged view)		 GRAFF

Technical Data
- Dimensions: 87 x 64 mm
- Thickness: 12 mm

No data available concerning the German company GRAFF

Pictures courtesy Thomas Meyer
(Click for enlarged view)

PRESTO catalogue		 ORIENT
Technical Data
- Diameter: 35 mm
- Thickness: 11 mm
- Overall length: 52 mm

Item retailed by Demaria-Lapierre, Paris, in 1900-1991.
In a PRESTO catalogue dated 1918, there is a price for the dial disk alone. This was probably for compass manufacturers, nor for replacement.
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