The copy of the June 1930 SA parts catalogue I have states that the LS 385 gearbox case (LS 385 is the model number not casting number) is for AJS R4 and R6 models. Which is slightly curious because I was always told that gearboxes SA made for AJS bikes were 2 stud fixing and not 4 stud ?
Still looking for an LS 383 2 stud gearbox for an AJS S10 if anyone has one for sale ?