As far as I'm aware, the twin pots are ATE brakes, they fitted those to RO80s and Audi Coupe S in the 70s.
If you have any there is a company on Droitwich which will put stainless liners and pistons in, new seals and galvanize the lot, had it done for my LS and have the calipers ready for my RO.
Fairly cheap about £60 a side
My UR still has single pots, it'll stay that way. Stock is good!
Keeps me aware of the speed as well

, it's alright getting up there but coming down quickly is always in the back of your mind.
