Despite its unusual appearance the Mignon typewriter embodied a very clever design, facilitating a smooth and fast operation for a typewriter with no keyboard. One’s thumb and forefinger pinch the black button to move the pointer to a character. This moves the type-cylinder into position over the paper before the black key in front is pushed down to type. The second black key gives a space.
The index plate and the type-cylinder could be changed with ease, allowing for different languages and fonts. The Mignon typewriter was popular for three decades and was produced into the early thirties.