I have the same watch in black and they're lovely things if a bit chunky. How is the timekeeping, as you say will probably need a service of sorts, but then I'd be very tempted to keep it unless you are looking for something completely different. Factoring in a service, in my humble opinion, I would say value wise you'd be looking between £1250 - £1350 depending on condition assuming it's a full set, which is what it looks like. Someone far better qualified will be along soon no doubt. But as I say, I think you should keep it, great beater watch. What colour are the hands on the subdials they should be red but look orange so they look to have faded somewhat.