P/N 1393915
Type
Model M Functional Keypad
Nickname
M50
OEM
IBM
Switches
IBM membrane buckling springs
Earliest Appearance
1988
Key Count
49
Original Keycaps
PBT with dye-sublimated legends
Casing Colour
White
Branding
IBM grey oval badge
Connection
Set 2/AT over SDL
Layout/Language
Functional Keypad
Additional Notes
Features an arrow key cluster in the middle key column bank and a numeric keypad with capitalised enter key in the right key column bank
More about this type of keyboard...
The 50-key Model M keyboards were designed for use with emulating IBM 4700 Finance Communication System applications on IBM Personal System/2 and later systems. As such, they possessed the same layout as the Model F-based IBM Model 100 keypads and came with either transparent keycaps or alphameric legends with a numeric keypad overlaying some of the keys via toggle. The alphameric version is the smallest usable Model M keyboard with a rough 50% ortholinear layout. The internal assembly also takes several production values from Model F designs with individual barrels, foam padding, and no plastic rivets holding the assembly together.