Got this today - in a small batch of watches, mostly ladies, and described as 'working'. It is a Silvana with the famous AS1130 bidfun-db Archive: Watch Movements: AS 1130 the
Wehrmachtswerk which was supplied to the German army in WW2. Silvana was on of the suppliers - but there's not much about the company anywhere. There website is a one pager. silvana watch
Anyway, it was very dirty on the outside, had a broken stretchy strap, and a scratched crystal. The lugs are 17mm and this is the only strap I have that fitted reasonably.