I am looking to buy a pair of Matchless's. One is supposed to be a 1963 350 street model, 80% complete, #'s start with G5. The other is a G 80 CS, looks to be about 60% there. Also a set of bare cases starting with 61 G2.
How do I determine the years on the G5 and the G 80? I've searched for a # system but finally give up.