IBM TPC Keyboard IV

Provided by the ASK Keyboard Directory

WorthPoint (used under fair dealing)
1987Model F/AT TEMPEST EM-Dampened KeyboardIBM capacitive buckling springsMore info on this keyboard

eg, P/N 4010504

IBM-made 84-key keyboard for the IBM 4459 TEMPEST PC IV (aka, TPC IV or TPC4), a TEMPESTed version of the IBM 5170 Personal Computer AT. This keyboard is a TEMPESTed version of the IBM Personal Computer AT Keyboard. Its controller electronics are shielded and it uses a male DE-9 plug instead of a 5-pin DIN plug.

Sources

ASK. Admiral Shark's Keyboards original content. License/note: CC BY-NC-SA 4.0.