Hi Hinrik I have only just registered. I stumbled accross this site whilst researching my own clock, a Kieninger & Obergfell. This was 'acquired' by my Grandfather who served in the Royal Marines during WWII. Although it was in pretty good condition, I have had the movement checked and a cog replaced. The face was polished Brass, but is now restored with silver oxide? I have attached a photograph. IF ANYONE KNOWS HOW I MAY TRACE THE U-BOAT IT WAS ON I WOULD BE VERY INTERESTED TO FIND OUT. Cheers Steve [attachmentid=21385]