1991 IBM model M (1391401) Made by IBM 01-30-91 custom keys



part# 1391401
serial# 5743541
date 01-30-91 (28 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 This keyboard is tested to work 100%. The keyboard assembly has been confirmed to be in functional, operational condition.
comments customized keys with lettering on side surfaces (end func, help, choice list, Val Calc Print, Dup Field, Clear EOF, Calc,  Load Form, Recall Total, Pay Get, Packet Print, Break Xmit, Read Next, Read Prev, EJ Search, EJ Last Tran, Sign Off, Clamps, Cash Calc, Add, Del, Edit, Disp, Read Next, Date, DUP-Cl/CO-Rcpt, Init Printer, Select Printer, Read Prev)


Additional information

Weight 7.1 lbs
Dimensions 24 × 12 × 3 in

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