@Léon P ,
Thanks for joining us with your intriguing artifact. The name OUDIN is still with us.
https://www.oudin.com
I have included a link to a Wikipedia item about the material, jet. It is found in England and France. In the Victorian era, jet was very popular for use in decorative items, and especially jewellery.
https://en.m.wikipedia.org/wiki/Jet_(gemstone)
I have also included a link to an article discussing jet as used in jewellery.
https://geology.com/gemstones/jet/
Do I detect stampings on the one component that might indicate the material used in the metal components? Sterling silver?
The landscape version of the pictures that shows the whole item leads me to believe this might have been a lapel or pendant watch that would be worn by a lady. What else do you collect?
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