Help with 1930's Omega

Hi! Can anyone tell me anything about this vintage women's omega. It was given as a christmas present in 1938. It's 22mm in diameter (measured from 10-4). I opened the back but everything is stuck to the back, so when I pulled it out the dial and everything came out as well. Because of that I can't see the movement at all. I don't know if it's by desing or has it corroded and stuck like that. Everything is so small and old that I just left it at that. I would appreciate any information on it and in general is it worth anything.

-Niki