Bulova 1957 Marquise
I think this is a Marquise of some type, still checking the ads.
It is a 14K white gold case with 18 very nice diamonds. The settings are undercut so light can penetrate properly up through the table from the side, the pics do not do this justice. I suspect there may have been a matching bracelet for this watch.
Update: I have cleaned the case and diamonds, and now the 'ice' really shows in the photo. Still have to service this one but she's in the queue.......
The 6C is from the Felsa 81 ebauche.