[carl750]

Did all 101-1300 Normale, and all 101-1600 have circlip (snap rings) to hold the pins from falling out if you turn the cam cover upside down while you have it off the engine? Version A in photo

Did all 105 not have it? Version B in photo

Anybody know what Version C belongs to?

 

[as761186]

Version A appears to be the 750 Series nut. Version B is a 101 series through very early 105 series. Version C is the mystery guest - never seen this in 50 plus years and suggest it is not Alfa, perhaps.