At a surplus sale, a friend picked up a large number of old circuit boards, probably 30-40 in all. Here's the box:
All the boards seem to be made by the same manufacturer and probably come from the same device. Notable components include motors, dials, and op-amps (LM741CN).
Close-ups of some of the boards:
and the back side of the motor board:
The most notable and obvious feature of these boards is the logo:
This logo is on the back of every PCB, although I could not identify it with either reverse image search or by searching for the description.
Can anyone identify the manufacturer? Maybe narrow down what era of technology this is (probably 1970-1980 but that's a big range)? Or what this device might have been? It's to satisfy a burning curiosity :)