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P/N 1389152

IBM Program Function Key Keyboard

Type
Model M Type I Functional Key Keyboard
Nickname
Battleship
OEM
IBM UK
Switches
IBM membrane buckling springs
Earliest Appearance
1986
Original Keycaps
PBT with dye-sublimated legends
Casing Colour
White
Branding
IBM silver square badge
Protocol
Set 3
Connection
Cable
Cable
Grey coiled fixed DIN (240)
Key Count
122
Form Factor
120%
Layout/Language
ISO
Additional Notes
"PFxx" command key block, known to come with a case susceptible to yellowing
Data Last Updated
2020-11-12

More about this type of keyboard...

Variant of a Model M Type I Functional Key Keyboard

The usefulness of the 122-key "battleship" resulted in several Model M versions of the design, with this being the first. The Type I was a largely internal rework, swapping out the capacitive assembly for a membrane one and changing the bottom panel from metal to plastic. The rest of the design remained the same, including the dual-setting feet, and the top casing is fully compatible between the Model F and Model M versions. Like the F122 it replaced, the 24-key function key block was labelled either "Cmdxx" or "PFxx", with the most well-known host terminal being the IBM 3179 Color Display Station. These are also commonly referred to as the "M122" (although the later redesigns are also referred to as such), and thus "Type I" is used to help distinguish it from the others.