A service for my Omega Seamaster 600

[Parabola]

My Omega Seamaster 600 keeps terrible time!
It is a windup watch, I think made in the 50's. Has a silver bracelet and tells the date. It loses about 3-4 minutes every day.

Could anyone recommend a place to get it serviced? Ideally in Manchester/Leeds as I don't really want to post it anywhere!
What should I be asking for/looking to pay?

Many Thanks

[GC8]

A Seamaster 600 (135.011 or 136.011) will have been made in the mid-to-late nineteen sixties. Id suggest posting it: either to Time-Repairs, or to Ryte Time (Google as written). Expect to pay £60-£70 depending on whether it has date, plus the cost of special delivery either way.

[Parabola]

Great, thanks. I'll give them a call tomorrow.

[Odie]

I was looking at the time-repairs website earlier, they are based in bury (im also in the manchester area btw) but you cant drop a watch off and pick it up, its internet based only :S

[GC8]

You can, but you have to pay the jewellers store prices, rather than Brians direct prices. I think that youll have to post it in order to get a good deal.