1988 IBM model M (1390131) Made by IBM 12 JAN 88

Description

part# 1390131
serial# 1303847
date 12 JAN 88 (33 years old)
IBM logo silver logo with black text
cable removable, gray coiled SDL to ps/2 cable (new cable)

 

key caps removable (two piece, key stem + key cap)
key switches clicky = buckling spring
Designed when “real” typing on a quality keyboard was a required skill to use a $4000 IBM personal computer. PC mag link
(pre-dates the then new mouse-click and graphical user interface operating system later to be known as Microsoft Windows 3.1 and 95)
condition Keyboard pre-selected as good candidate and passed initial testing to confirm mechanical condition.  Upper keyboard case disassembled and individual 101 keys have been removed and fully cleaned by hand.  Inspection of interior plate.  All 56 plastic rivets drilled out and replaced with M2 precision screws to restore internal integrity.  Interior plate vacuumed to remove foreign debris.  Keyboard re-assembled and re-tested post-cleaning. Individual photography of rear label.
comments  
comments This keyboard is tested to work 100%. The keyboard assembly has been confirmed to be in functional, operational condition.
comments All 56 plastic rivets have been expertly replaced with M2 screws for ensure for a tight and crisp keyboard feel.

Includes 4 blue 7/32″ screws primarily found in 1986 model M keyboards.  Silver IBM aluminum logo and top plastic case has some scratches (see photo)

Additional information

Weight 8 lbs
Dimensions 20 × 9 × 3 in

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