[sdiy] ARP Butter Tub Modules

[Loscha]

So, there are a few of those ARP MSL Educational Modules on ebay at
the moment. The kind that are in a little Butter/Margarine sized tub,
with two 9v batteries each. Matrixsynth covered it here
http://matrixsynth.blogspot.com/2007/03/arp-modular.html

A few more pics to be found here.....
http://www.synthmuseum.com/arp/arpmsl01.html

I've always wondered what was in them.
Has anyone got schematics of them? Or even some internal pics?

Back in my infancy of electronics (when I was 13-14) I started making
a bunch of general purpose electronic modules, and put them into empty
Nuttelex containers. before I knew about synthesizers, and modular
architecture, sadly, I don't have them any more. Stupid stuff, an
electronic dice, 555 oscillator. Before I knew about sinking/sourcing
current and wondered why I kept on burning out logic chips! Oh well,
we live and learn.

-Ed