[tcw]

I just figured out that in the picture of post number 2 above, the blue stamped letters 857819121OA, the "857" is the EIA identification number for V-M Corporation. "819" is the date code (changer built 19th week of 1958) and 1210A-105 is the actual V-M model number of the changer. The model numbers are usually a “900” or “1200” series number.

Thanks again for your input morzh.

Tom