The gazamba is an electromechanical musical instrument, essentially a prepared electric piano.
The vast majority of electrophones produced in the first half of the twentieth century were what Sachs called "electromechanical instruments".
Examples of electromechanical instruments include organs and electric guitars.
Early electromechanical instruments, such as the Ondes Martenot, appeared early in the century.
The equivalent electromechanical instruments are also shown here.
Ideally, only the data in use would be displayed, but an electromechanical instrument has to be in view all the time.
If a failure of input data is detected, electromechanical instruments add yet another indicator to the display.
Another electromechanical instrument is the polarized-vane type.
The CRTs replace conventional electromechanical instruments found on earlier aircraft.