Picture by David Broglin. (Image rights)
The Princess is a 35 mm fixed-lens rangefinder introduced in the early fifties by the italian company Closter. The first version had a round rangefinder window and had an Aries 4.5/50 lense. The Princess 2 and 2a had a rectangle window rangefinder and resp. 3.5 Aries and 2.8 Zemen lense.
The focusing knob is strangely placed on the center of the top plate of the camera.