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Each contribution is helpful and valuable but don't forget to indicate your source, unless this cannot be taken into consideration. 

We will be happy to answer any question. On the other hand, we would also be grateful for any financial support in return.

Even small donations are welcome. Thank you.

NOTE 

The Online Compass Museum will also be grateful for signalling any error in the technical descriptions or such ones that could lead to misunderstandings or hamper easy understanding. You are kindly invited to copy the source code of faulty text parts and send them back vial e-mail with your corrections to the Museums's Curator.

This website is maintained by J.-P. DONZEY, Munich/Germany .