(model M5-2, 101-key keyboard with 25mm trackball) *see note below
|date||8/15/95 (25 years old)|
|IBM logo||dark blue text on dark gray|
|cable||removable SDL, coiled cable, 2-head ps/2 connector (new cable, standard length)
includes modern ps2 to USB converter confirmed to work with this keyboard (included free)
|key caps||removable (two part, key stem + key cap)|
|key switches||clicky (buckling spring)|
|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.|
|Manufactured by Lexmark. Lightly used, open-box condition|
|comments||Includes IBM original exterior cardboard box (used condition with writing and other shelf wear marks) with IBM informational graphics. Interesting, but imperfect, find for the IBM mechanical keyboard collector. Unit was recovered 25 years later with the IBM exterior box, styrofoam, IBM keyboard, SDL to two-head ps/2 cable, ps/2 to USB converter, IBM 3.5″ floppy disk.
The 25mm trackball on these keyboards is based on late 1980’s IBM rollerball ps/2 mice and does not compete well with modern USB optical mice. Originally these model M5-2 keyboards were used on CRTs with 640×480 resolution and modern users would be disappointed to use the trackball on modern 4K or 2K (2048 x 1152) displays. Can you use the trackball to move the cursor? Technically yes, but most people would probably prefer to use a modern 2021 USB laser optical mouse versus a 1980’s rollerball. Keyboard being sold at a discount to account for aforementioned.
The keyboard typing sound and feel of the buckling-spring mechanism is what these model M keyboards are known for and it is rare to find these vintage IBM keyboards with the original box and original driver disk. Due to condition, not considered as (new in original box: never been used)