Hi All. Just a quick question for all the knowledgeable folk on here. When did the ribbed rear guard change to non ribbed?
The pre-war M-series bikes had a rib but later on, this seemed to be deleted. It would be helpful to find out the change point.
Many Thanks in advance. Pete.

I think it was very late 1943...I'll check it out to come up with a more definitive date....Ian

email (option): ian@wright52.plus.com

Thanks Ian.
I will eagerly await further news.
Many Thanks, Pete.