IBM 50 Key Keyboard
From Deskthority wiki
|Layouts||50-key with specialized Keycap labels|
|Keyswitches||Buckling spring over membrane|
|Years of production||1990|
The IBM Model M 50-keys is a sub-tenkeyless matrix-layout buckling spring keyboard. Judging from the specialized keycap labels it might have been used as a cashiers keyboard or similar.