Just picked this one up; case dated 1951, with an apparent movement swap. Movement dated 1946 (square). Case is white gold plate, with gold colored numbers on face and gold hands. It's the apparent victim of a poorly done face cleaning that removed a lot of the seconds and minutes tracks. Runs and keeps time, case is really clean.
There are a couple of these it the Db, one being another in my possession that is also dated 1951. All have the same face with gold numbers and diamonds at the 12, 3 and 9 in a white gold case. Initial response to these has been that they may be a marriage. I think this is about the 5th one I have seen, some with white face and some with black. Wish I could find an ID.
Last photo is a family shot of subject watch and the other I have.