P/N 1397440 - Model M Keyboard Details & Specs

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Provided by the ASK Keyboard Part Number Database

IBM Personal System/2 Enhanced Keyboard

Type	Model M Enhanced PC Keyboard
OEMs or ODMs	Lexmark
Keyswitches	IBM membrane buckling springs
Earliest appearance	1991 Q3
Original keycaps	PBT with dye-sublimated legends
Cover colour	Pearl White
Branding	IBM grey oval badge Or IBM blue oval badge
Feet	Single-setting flip-out feet
Protocol	IBM Mode 2 (scancode set 2)
Connection	Grey coiled-style detachable 6-pin SDL to 6-pin mini-DIN PS/2 cable
Number of keys	101
Form factor	Full-size
Additional notes	Its FCC filing whose ID is the same as this part number explicitly states this keyboard has "no Ferrites on Cable" compared to other Enhanced Keyboard FCC filings (e.g. IYL11A0200, IYL1395100 and IYL60G3571)
Sources	Web: https://fccid.io/IYL1397440 Web: https://www.clickykeyboards.com/product/1992-ibm-model-m-1397440-made-by-ibm-11-10-92/ Web: https://sharktastica.co.uk/archive/view?id=8cd87123c94dc0b3
Data last updated	27^th February 2025

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