M A Cotter MK-2 transformer differences?

Think they are just for different impedance cartridges. I have a "verion" P (predessor to him calling the company cotter) that was meant for 3 ohm cartridges. All the models are re-wireable to other settings (plate where hook-ups are comes off & reveals 9 or 12 pins which are jumpered to create specific impedance)My verion is also blue and appears identical other than brand name. Think he OEM'd it to Bryston for awhile too

Great, so would anyone happen to have information regarding the setup of this unit, or know where I can get it? I couldn't find any information whatsoever on this company except for links taking me to this forum.

I emailed an on line service manual company lets see what they can dig up
http://www.servicemanuals.net

Regards

Groovey Records