While I don't see any originality-issues except for the crown, which doesn't belong to the ref, I find the price still a bit on the high side. 750€ for a gold-plated examples with a dial that's not just patinated, but damaged (scratch, something chipped of on the cross hair in the lower middle). A replacement crown isn't necessarily an issue, but personally, I'd want the clover crown on that ref and also one that matches the gold tone.
I would ask if the pictures were taking before or after the service. If it's the latter, I'd be sceptical about the service, looking at the position of the regulator...
All in all I'd say patience would buy you a nicer example for that kind of money.
