I have 2 PTO's on the floor...I took them both off of SM-420 transmissions.
The first one is a Spicer one gear, there is no tag (never looks like it had one)...there is a casting number (maybe a date code) "X1C".
The second one is also a Spicer with a riveted tag Model "HNC 13". This unit has two gears and has a 1:2 ratio (one turn of the transmission gear gives two turns on the output shaft).
I'll look at the tow truck when I have time and report back with that info.
Mike B
