The interesting thing is the lectrolite still has the spline socket on the end, all the cars that used that type seem to have been ones that vanished early (A in Bus's list)....
>drastic differences in construction
Cost, drop forged was expensive, machine stamped was cheap....
Stamped tools were almost a fanatic fad for a while, they were easy to make, cheap, and you could sell them to anyone who hadn't bought one before.
Mossberg got into it because Frank owned a stamping company, many of the other tools makers got into it because it seemed like the next best thing, tho, some of them should have known better...