Most likely gold-filled, this is sort of an early Seamaster De Ville or pre-De Ville with the coat hanger S dial, nice watches, decent water resistance, some are gold-filled, some 14K solid gold, and you’ll typically find the words “14K Gold” or “14K Gold Filled” between the lugs on one end.
There is probably a tiny 14GF somewhere. BTW, the watch has no case-back. It's a one-piece case.
so its opened from the glass side?
How do you know that its not solid for sure? Are there any other signs or is it just your guess? In the internet I can see many variants of that seamaster with gold back, plated, filled and solid, many dials and hands settings.
Sorry, I don't know that it's gold-filled vs 14k, I was just encouraging you to look very carefully for small markings.
Yes, the movement comes out through the front after the crystal is removed.
