They look really good.....
You're going to have that seal replaced and the piston checked for corrosion, if you post them to me I'll lube em up and check em over for you and ship them back with the carriers/hoses/bolts.
I've got spare seals here they'll be as good as new once you get them back no charge 
If theres enough interest I'll try to do a fixed price refurb on these calipers, already painting some for somebody in a funky colour.
Maybe 110 quid instead of the 150 I normally charge for 4 pots, within that I could get a small "pot" going for new seals, so if you got a crap pair it would cost the same within reason.
Turnaround would be 2-3 weeks however
You're a star, Dave. I would like to take you up on that offer
In fact, I would like to go +1 for the refurb even if you don't get enough takers for the fixed price (I know that I will never get things looking as good as the pictures you posted earlier with the tin of Hammerite in my garage). I think I will stick with postbox red rather than funky colours as I don't think tartan calipers would work even with my Scottish heritage
Would you mind PMing me your address please?
I managed to pop one off the pistons out and extend the others on one of the calipers (using the old fluid line which was still attached to one of the calipers when I received it, a bit of tubing and a foot pump of all things. Don't ask!
and I'm thinking 'what am I doing? why don't I just sent these to Dave B?' .
Extending the pistons showed that I need to replace 3 if not all 4 of the rubber boots and whatever on the other side so I think you'll need to factor that into the cost. The seal and piston looked ok in the one that popped out but showed how much water I had let in while cleaning them up so I blew some compressed air through each and are now drying out (I hope) with the bleed nipples off.
I went for those Brembrake discs and kept it simple with a set of Textar pads.
