Help me identify this vintage Tudor rectangle

[mister tawny]

I picked this up not long ago on a whim, but now I want to find more about it. The case is marked Rolex, the movement is from Tudor (15 jewel). I have looked everywhere and I can't find anything about this watch. So I figured it's time to bring it to the experts.

I have looked at tank watches as well as rectangle. Size (1.25" by 3/4") is small like it was for a woman or child although I have seen Tudor literature showing a man wearing this type of watch.

Anyway any info would be greatly appreciated....

[adam78]

It looks authentic, but there's not much info available on the non-Oysters, especially Tudor. Probably from the late '40s. It is a mid-grade watch with plated case (N.B. it says "stainless steel back"). 15J movements were unusual after the early '40s. Most manual winds were 17J.