V65 engine and frame numbers

Hi, I’m looking at a v65 which is an Italian import, is there a range of engine  and frame numbers that I can check to make sure it’s Genuine and not a mix of other bikes, v50 etc?

I saw some listed on thisoldtractor but only for the LM 1 and 2 models. Â

I think they’re listed in Mick Walkers restoration book, I think.

What are the numbers and I’ll check them for you?