I think it is some sort of DTL (Diode transistor logic) NOR gates like Alex and LabSpokane suggest. Most things are in tens here; ten transistors, associated resistors and capacitors etc, but the input diodes are odd so we don'ty have ten identical gates.
Looking at the lower left transistor and associated components, there are six input diodes leading into the transistor with some biasing through those brown resistors. What I find odd is that the signal seems to go through the black diode, which would be reversed biased (unless the current is flowing out of the base? PNP?). The signal (six inputs ORed together by the diodes) is amplified by the transistor and goes back out the connector.
The lower right gate has only 3 input diodes, so it's probably a 3 input NOR gate.
Thanks for sharing this! It's very interesting to me.