I think the early hand cranks had different fitting, I'm not sure how many types there were, but there are at least three different size hand wheels on these. The earliest have the heaviest, solid mass of metal, then gradually lighter. I don't know enough about compatablity between them, but not all are. That later solid ones for electrical motor is a seperate issue. With a second look at the pictures I'm not sure any more, the last picture made me think it was the earlier type hand wheel.
Last edited by Mickey2; 09-07-2020 at 03:27 PM.