1991 IBM model M (1391401) Made by IBM 11-22-91



part# 1391401
serial# 8187139
date 11-22-91 (27 years old)
IBM logo black logo on white background
cable removable SDL, coiled cable, ps/2 connector (new cable, standard length)
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. Photo gallery of typical restoration workflow.
comments The keyboard assembly has been confirmed to be in functional, operational condition.
comments Num Lock, Caps Lock and Scroll Lock keys all function as they should to the computer; however, scroll lock LED does not illuminate, see last photo.  (But really.. who in the 21st century knows how to use the Scroll lock function and good candidate for those who want to save a few dollars).

Additional information

Weight 7.1 lbs
Dimensions 24 × 12 × 3 in

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