As has been mentioned, you need to open up the case to get more info.
Just from looking at the picture, it seems to be a US market gold-filled case. Not solid gold. Probably a bumper movement.
To me the dial appears to be original, but it's hard to say anything conclusively from the fuzzy pictures. The hands seem to be missing the luminous material and the crown is not original.
In terms of valuation, I agree with Davidt, a few hundred £,$ or Euros.