image by René Maly (Image rights)
The Leica mini is a 35mm compact camera, made in Japan.
This is a very basic model. It has an auto-focus prime lens, Leica Elmar 35mm f/3.5. The only thing the user can set are the flash modes, on/off or auto. There is also a self-timer.
By it's size of 150x60x38mm and weight of 184 grams it is a true pocket point&shoot camera. See also Minolta Riva Mini, which is most probably the same camera.