Hi
Nice looking watch especially with that strap, I'm not very experienced but have learned a lot from the guys on this forum over the years, so please defer to some of the longer members if their advice differs, the movement is from Omega's line of automatics they brought out in the 60s and stat with 5..., and generally regarded as a workhorse and very reliable, i have a few 565s and a 552, and they're pretty accurate still,
i can't see the condition of the movement from the photos but i usually look for different coloured components, they should all have aged equally so if you have a rotor that is darker or lighter than any other part of the movement then it's possible it's been changed during a service, but could indicate some messing about in the kitchen with a knife and a magnifying glass, also look to see where the rotor rotates and if there's any scuffing where it might have been brushing against the parts beneath it, check the serial number of the movement and the corresponding year it was made, there are tables online with all the serial numbers and their corresponding years, if there is any paperwork pertinent to the service ask to see it as well, and if you can check the service centre/shop, give them a ring and ask how they go about servicing vintage Omegas, just to see how they respond and you can often judge a little bit of their competence by their manner, gives you a bit of confidence or confirms the opposite
I would also check the number in the case back and google the hell out of it, be merciless and read every piece of info about that number look at every photo close up and do it until your eyes bleed, confirm the model left the factory with that movement, half the battle for the seller is that the buyer wants it to be real, if the buyer wants it to be real then he or she will convince themselves it is, so look at it with the most sceptical eyes you can muster, try to find fault with it as opposed to overlooking anything and putting it down to "character" or aged wear,
The S in Seamaster was like that for a while with some of the old ones, i have one with the same S and it's a genuine one so i'd not worry about that,
I'm afraid i'm not experienced enough to judge a sloppy redial or right/wrong hands, but i'll post a picture of the one i have that is similar, a 552, which i paid £300 for (and was also recently serviced) and you can compare the hands etc, my dial is in a sorry state but i like it aged and traumatised, makes me feel less so, it's case back number is 14761-1 and runs very well
I'd offer the seller half what they want after doing a lot of research about the watch, because unless it has some ground breaking provenance (ie belonged to Stalin or Eisenhower) it's a bit overpriced, in my very humble opinion, even if it is a very nice clean one
