Are the specs on a 15(or there about) crank handle the same as later 20s handles, Are later handles a little longer to provide for the lower radiator apron? Earlier is no doubt a more comfortable item but is it shorter from the bend?
They should be all the same in the area you are asking about. I like the early style myself, the ones with the riveted on sleeve. The 21 up style, seem to get worn and rusted in the crimp area want to pinch the web between the fingers.