I picked this up for almost nothing at a garage sale, at first glance it seemed to be a Rutherford, but now that I examine it closely, I'm afraid it's non-conforming, that is, with a likely movt and dial swap.
Wow, that is an interesting and creative combination, but it works.
Appears to be the face from an early 1940's yellow gold Princeton , which was a 21J movement
1943 movement with 15J
Casing from a 1950 Ashford (17J), Rutherford (21J), or perhaps Neptune? I didn't research for dates or model production overlaps on these.
Looks like an inexpensive, fun daily driver to me.
Too bad it's non-conforming., it's a handsome combination. My guess would be the original owner drowned his watch (killed movenent & face) and took it to a jeweler with the instructions of "fix this with whatever works so I can wear it".