Any of you guys ever seen a genuine Chevrolet AC-DC generator. I just looked at a filmstrip that covered one. The strip dated 1953 was for low speed vehicles such as taxis, etc. Low speed output was given as an advantage. And I thought that early 60s were the first Chevy alternators.

Chip, actually Chevrolet had an alternator on some of the large trucks as far back as 1939. it had a huge rectifyer in front of the radiator as I remember, seems to me it was a Leece Neville. anyone else remember this?.

If you look at web page /~r1937/12Volt.htm> it shows the 1937 Silver Book option of a 12 volt alternator and the rectifyer location where the horn usually mounts on the manifold.
My 37 Chev / Flxible has a 6 volt Alt with 2 six-volt batteries in parallel. It's picture on on page /~p1937/Flx.htm>.

The California Highway Patrol and some police departments used Leece Neville Alternator setups in the 40's and 50's. I suppose some were installed after delivery but the CHP had a detailed specification that the manufacturers bid to so the cars came from the factory that way. I owned a factory assembled 58 Mopar that was a CHP Prototype and it came with the L-N. It looked about twice the size of a modern alternator.