Eisemann 71H with larger diameter mounting hole and stamped steel handle & cam assembly. this will fit revise 1941 and later twins thru postwar up to change over to Bendix magneto which again involved a revised crankcase casting.
Note: to those, like myself, who are too eager to tear things apart…the collection of stamped steel magneto handles that will need some detective work to find their way back to magneto plates they belong to. Can only be done by comparing to unmolested examples.
Louis