UPDATE: Ossa Short Tracker For Sale UK
UPDATE: As I wrote below, I didn't know the history of this bike, but I asked around, because if it was an ex-Dick Mann bike, I wanted it myself. Ossa experts in the States say it has a stock frame, not a Champion frame that a pukka period Ossa short tracker would have. It might still make a good DTRA vintage race bike, but it's not a framer. This Ossa belongs to a friend of a friend, but we don't know the history of the bike, so anything below is purely the seller's claims.