WinKing and MacKing Keyboard
Separated and enlarged 1 1/4 diameter keys are slightly recessed allowing user to stabilize limb on keyboard without activating keys. Revised key layout places most often used keys near the centre. Keys click when activated providing feed back. Meas 21.5 x 11 x 2.25 in / weighs 5.5 lbs.
More information: http://www.maxiaids.com/winking-and-macking-keyboard-ibm