Vintage Keyboard Identification

[jws]

Hi community,
I just rescued an old keyboard from a dumpster and am trying to find out which model it is.

No outside markings except a faded inventory number and a sticker from a company selling electronics for the disabled. The keyboard was fitted with an acrylic pane with holes to aid people with motor impairments, so this makes sense. German ISO-DE layout. Clicky Cherry MX blue switches. 5-pin DIN type connector with an AT/XT dip switch on the back. Two PCBs inside connected by wires, the larger etched with "T145" and a sticker "144 T175", the smaller with a sticker "Pro1 1530". Googling neither of those terms returned any useful results.

Maybe the case is custom or customised to fit the threaded inserts for the standoffs of the acrylic cover? But then again the PCBs most likely is stock and I could find no keyboard with that layout either.

One last thing: the company sticker on the back already has a new 5-digit zip code. Zip codes were reformed in Germany in 1993, so the keyboard was sold after that point although the model itself could be older.

I could not test whether the keyboard works, but as a far as I understand I would need an 5-pin to PS/2 adapter and then another active PS/2 to USB adapter to make it work, right?

Thank you for any help and pointers.

[kbdfr]

Did you try to simply call the phone number on the sticker?
And a search for "Färber + Reteaca" retrieves a "Rehakomm (instead of Rehacom) Peter Jacobi" with different addresses and phone numbers over time.

[Green Maned Lion]

You could just get a DIN180 to USB active converter...