Hi was always my dream bike got hold of it by fluke really. Know 6 people that know its history from previous owner all in 70s(age) was well known bike around Nottingham. Story was it was raced in early 60s before guy bought it tale was by BSA, (I KNOW EVERYONE SAYS THAT) Had a couple of guys that are knowledgeable look at it we all took BSA story with a pinch of salt, but after they looked they said they would not rule it out needs more investigation . (If it is its a bonus but im cool either way) Your right about some parts, tank is fibreglass was on in early 60s Just digging some big Hi res photos out will put them on appreciate any input