This I didn't know. I bought a Tektronix 4207 color graphics terminal without a keyboard recently.? Finding the correct keyboard part number seemed to be a process with great uncertainty, the VintageTEK folks said the correct one was a 2468.? One of these was for sale on ebay for $300 - no way was I paying that much! So I tried one that looked like the keyboard in the TEK catalog of that period, but with a different part number. The connector looked like the right one though.? I got one off ebay, and I thought it was kind of expensive, but it did work with the 4207 terminal. What I didn't understand was a fascination with the black mechanical Cherry switches the keyboard used.? These turn out to be extremely popular with the 'gaming' community.? I don't know if the tektronix keyboard can be used with a modern PC, I haven't looked at the interface signals yet.? The modern PS/2 keyboard has a clock and data line, the DEC LK201 used rs232, so what Tektronix used is anybody's guess.