P/N 1396575
Market Model Name/Feature Code
0251
Type
Model M3 Numeric Keypad
OEM
IBM, Lexmark
Switches
IBM M3/M4/ThinkPad buckling sleeves (Lexmark variant)
Earliest Appearance
1991 Q2
Casing Colour
White
Branding
IBM grey oval badge
Protocol
Set 2/AT
Connection
Cable
Cable
Detachable modular 8P5C ("RJ-45") to modular 8P5C ("RJ-45")
Key Count
17
Form Factor
Tenkey
Layout/Language
Sweden/Finland
Additional Notes
Sports a pass-through PS/2 connector for PC-compatible mice
Data Last Updated
2020-11-12
More about this type of keyboard...
The Model M3 numeric keypad was an optional attachment for the IBM Personal System/2 L40SX laptop. It was notable for being the first individually-distinct device with IBM's buckling sleeves switches. The keypad also sports a pass-through socket for a PS/2 compatible mouse.