IBM Portable Numpad
Rubberdome, Sublimation-dye keycaps, 1992

I don't know much about this one. I assume it came with an IBM portable computer or "laptop" in the 90s. There is an SDL connector on the back and a PS2 port to connect your existing keyboard.

This number-pad uses the same style rubberdome keycaps as more modern IBM Mightymouse and probably a few vintage IBM Thinkpads.