Vintage - probably 1950s/1960s - Telephone Exchange Multiplexer Circuit Board. This looks to be new and unused but it’s obviously very old. Lots of vintage components such as OA71 geranium diodes. I was keeping this as I thought it would make an interesting project but I can’t find any details / circuit diagrams of anything even similar, so my chances of using it for anything are pretty slim. Interesting and collectible piece of telecomms history though! Any questions please ask.
eBay