
While I haven't been actually able to date this "keyboard". The Teletype Model 28 KSR Keyboard was first introduced to the military in 1951! (http://en.wikipedia.org/wiki/Teletype_Model_28)
It is 1KRO (you that's the purpose of the ball bearings you can see in one of the pics), truly mechanical, uses a motor to achieve speeds of around 100 WPM, and can easily be made USB compatible (once I replace a few gears, and figure out the best way to power the motor).
I'm actually not quite sure what to call these switches yet...as there is only technically a couple micro switches and special highspeed rocker switch.
Conveniently has the patent numbers right on the frame

US2605366
US2607848






























