Vintage Horticultural and Garden Machinery Club

Geoff , you may well be correct regarding the sourcing of various parts from a number of different manufacturers. One BSA part need not make it a BSA engine.
I recall many years back doing the mechanical work on a Scammel fire pump engine for a chap , I fitted some new big end shells in it , a perfect fit straight out of the packet…….their listed fitment was for a Hillman Imp. Mr Childs may well throw some light on this mystery, there are few people , if any , that know more about British engines than him.

Andy.