I spoke with Peter from cornucopia some years ago when he used to attend netley marsh about a valenced guard he had there
It had valences but no rib - just a flat section
He assured me that this was found on some bsa bikes pre war & suggested M23/24
I left it go - as I was looking for one at the time myself with a rib & coupled with fact he was very knowledgeable- I didn’t really go into an in depth conversation with him on it

Jo’b

email (option): jonnyob1@googlemail.com

Hi all,

OK, the valances are a different shape to those of an early K/WM20 -more rounded at both ends (compare to bottom photo, below), so not cut off and put back in reverse. They look original to me: the edges are rolled and fit well to the mudguard. The paint is old, as is the rust, and there's no obvious signs of bodgery...

Come on: win yourself a coconut! :upside_down_face: