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P/N 1370478

IBM Trackball Keyboard

Type
Model M5-1 Trackball Keyboard
OEM
Lexmark
Switches
IBM membrane buckling springs
Earliest Appearance
1993
Original Keycaps
PBT with dye-sublimated legends
Casing Colour
White
Branding
IBM blue oval badge
Protocol
Set 2/AT
Connection
Cable
Cable
Grey coiled detachable SDL to dual PS/2
Key Count
101
Form Factor
Full-size
Layout/Language
US ANSI
Built-In Mouse
16mm Trackball
Data Last Updated
2020-11-12

More about this type of keyboard...

The 16mm IBM Trackball Keyboard is the first of two variants of the IBM's trackball-integrated Enhanced Keyboard variants. The Model M5-1 is by far the rarer of the two, which placed a 16mm trackball above the arrow keys along with four mouse buttons (two for left and right click and two for left and right stepped-click).