1995 Lexmark model M15 (ergonomic) 1428401 22 November 1995

SKU: 0003429 Category:


part# 1428401
serial# 0003429
date 22 November 1995
IBM logo Lexmark corporate logo (black and red diamond)
cable attached cable with ps/2 connector
key switches clicky = buckling spring
comments Keyboard appears to be excellent condition (but has been previously used).

Technical specs
Number of Keys: 89
Distance between keys: 19.05mm (.75in)
peak tactile force: 65+/- 10grams (2.3+/- .35oz)
Keyboard slope: 5 degrees, 11 degrees, or 17 to 25 degrees
Keyboard opening angle: 0 to 90 degrees
Keyboard tilt angle: 6 degrees or 12 to 20 degrees
Single 2m (78.7in. coiled “Y” cable

comments Keyboard is unique in that it is the only mechanical buckling-spring keyboard made by IBM that is fully adjustable in terms of ergonomic position.  The two halves of keyboard are connected at ball-joint and can be separated into two separate pieces.  Split space bar has erase-eaze feature.   Keyboard can be also adjusted to various heights to accommodate most comfortable typing angle to alleviate stress on hands, wrists and arms.
comments Very few were ever made by IBM.  Ergonomic keyboards are always very expensive compared to traditional keyboards… but we figure it is easier to buy an ergonomic keyboard than to pay an orthopedic surgeon to surgically operate and to rebuild your hand/wrist/arm. Of the 1000+ keyboards that we have sold, this is only the 16th IBM model M-15 ergonomic keyboard that we have seen.

Very limited item. One previous buyer was a developer from Google in Mountain View, another was to an engineer from “1 Infinite Loop”, third was to an orthopedic surgeon/ergonomics expert from New York, one was a dedicated vintage keyboard collector from Tokyo, Japan one was sent to www.dansdata.com for their hardware review.



Additional information

Weight 6 lbs
Dimensions 24 × 10 × 4 in