IBM Model M 1391401 09-30-91

First, test fit of a beefy plug that deserves to be with an M.

USB B plug modification


Keyboard back label details:


Part No : 1391401

FRU No : 1392090

I.D. No : 8084135

Date: 09-30-91


I honestly do not know who the owner is. We just had several text message exchanges and sent this unit on October 15, 2020 when I mentioned that I already have nuts and bolts in stock. 

The unit was sent without its SDL cable and a loose left shift button and stabilizer. Aside from this and some sticky stabilizers, the unit is pretty clean and works well.

Inspection photos














Under the keycaps














Behind the casings

There are a lot of rivet heads are loose but none are found inside the casing. Someone must have opened this keyboard and cleaned them.






...time to work











































Back plate preparation and painting























Top plate and holes




Assembled








Testing next to my M







USB Modification

Thank you, Soarer. Wherever you are.









What's currently left is some case and keycap cleaning then off it'll go back to its owner.

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