via the seller:
"I bought this highly interesting-looking sequencer/clock divider/timing module many years ago but never found the time to try and get it to work since I never acquired a modular synthesizer to integrate it into as I'd intended.
I am unable to say if or how well it works. I don't even know exactly what it does, but you can see that it has S-Trig ins and outs and a host of other features which indicate that it is a sequencer/clock divider of some kind.
This is a one-of-akind custom module that's been very professionally built by an outfit called "D.C. Systems".
Maybe a forerunner of another modular synth company? Maybe defunct altogether?"