I’ve just purchased a gold mine by UPI - like the one in the pic. Awaiting delivery.
I know the electrics are currently non-working. It was made in 1965 but the circuit board has integrated circuits on it which weren’t around then someone has added a new circuit - see second pic.
Does anyone have any internal pics of the original workings or know any info on where I might find out a bit more about them and ideally a schematic?
Thanks