Here’s one that went at the local auction house last summer.
I think it’s called a Rocket 3. A few were gushing over it because it’s, I think, a greyframe. Only BSA from the factory that came with a white frame.
But, I think it was Hacksaw that said it was more a denoting
of the year, which I believe was 1973.
Whatever, there were half a dozen Triumphs there, all went for 3 to 5 grand.
This bike, no title, rust in the tank, and missing a few parts,
Went for I think 11 grand.