Zeus Bottom Bracket, £25 (includes 1st Class Recorded Postage at £3.65)
English threads / 68mm bottom bracket shell
Non drive to drive side: 30mm - 54mm - 34mm
Campagnolo / ISO taper
Condition looks to be good. All parts, complete except bolts are Campagnolo. Bearing cages present, but I'd replace the balls. Cosmetically it is pretty perfect!
Mechanically, the dark patches appear to be staining on the bearing surfaces of cups and axle. But I've cleaned them up and they generally look okay and I can't see any really bad pitting. There seems there may be some light spots, not totally sure. I think it would work well and be smooth though, perhaps just not perfect.
Stuck lots of photos below to try to show condition of bearing surfaces well. (Oh, and it's a hair on the axle in a couple of pics... Not a crack!)
Simplex, Prestige, Rear Derailleur, £8 (inc postage)
Marked Prestige on rear. Good condition. I've given it a decent clean to get all the gunk off, but would clean further. Might be able to get the marks off the chrome with a little time and patience. Spring, mech feels good, strong, solid. Jockey wheels look decent too, not too badly worn.
Again decent number of photos below.