4/5
A friend of mine bought a Triumph GP back in 1971 for, I recall, £4 It was in very poor shape and very ropey. He never knew what it was but we all told him that it was very unusual going by the engine No. and the strange cylinder head configuration, along with engine case mods. After some brief road usage I recall that he gave it away. I still have a picture of it if anyone is interested.