@th Are these too NS displays? Do you know Baco in IJmuiden, they often have surplus LED panels and such.
@artelse this is an external NS display; the one that I was working on last weekend was an internal display and, since it was indoors, didn't have as much corrossion cementing the circuit boards in place. Pinout looks to be the same, with an extra voltage and ground connector. https://github.com/osresearch/train-display
@th BTW, the displays Baco in IJmuiden still have on sale were also from the NS, but then from their sales desks I belief.