Quoted from woody24:
SOLVED! Bosses husband was in, so I asked him. I guess my bosses brother used to work for RCA and this is a prototype board for an integrated circuit. Probably around 40 years old.
Very cool! Although ICs are now ubiquitous and haven’t really been “novel” since the 70s, it’s still gives a sense of wonder to see a tangible example of the scale - all that complexity was destined to be shrunk down to 2-3 square mm, still amazing!
In that vein, I just finished building the kit below (kabtronics.com). It is a simple digital clock, but is designed with discrete diode/transistor circuits; the only modern part is the MOSFET in the nixie supply, otherwise this thing could have been built in the 60s more or less as-is. It ships with an unfinished wood plaque for mounting, but I think I am going to put it into a shadowbox and perhaps try to do some form of Pinstadium-style lighting to highlight the board in a dark room. (I highly recommend the kit - outstanding build manual, excellent parts/PCB quality, and great soldering practice.)D2A8C98D-4079-49BA-B179-055F5BACDF5E (resized).jpeg