The Leica II is a rangefinder camera

Rangefinder camera

A rangefinder camera is a camera fitted with a rangefinder: a range-finding focusing mechanism allowing the photographer to measure the subject distance and take photographs that are in sharp focus...

 introduced by Leica in 1932. They were the first Leica cameras with an integrated rangefinder. Several models were produced over the years, in parallel with the Leica III

Leica III

The Leica III is a rangefinder camera introduced by Leica in 1933, and produced in parallel with the Leica II series. Several models were produced over the years, with significant improvements....

 series from 1933.

The Leica II uses a coupled rangefinder distinct from the viewfinder. The viewfinder is set for a 50mm lens; use of shorter or longer lenses requires installing an alternate viewfinder on the accessory socket.

Leica II models

Model name	Manufacturing dates	Features or improvements
Leica D (Leica II)	1932–1948	like III but without slow speeds on frontal dial
Leica IIc	1948–1951	Die-cast Die casting Die casting is a metal casting process that is characterized by forcing molten metal under high pressure into a mold cavity. The mold cavity is created using two hardened tool steel dies which have been machined into shape and work similarly to an injection mold during the process...  body like the IIIc Leica III The Leica III is a rangefinder camera introduced by Leica in 1933, and produced in parallel with the Leica II series. Several models were produced over the years, with significant improvements....
Leica 250 DD Leica 250 Reporter The Leica 250 Reporter is a body variant of the Leica screw mount rangefinder. It was designed to take bulk film by rolls of 10 metres, allowing 250 exposures. The film was charged in special film cassettes ....	–	Leica II-based Leica 250 Reporter
Leica IIf	1951–1956	Similar to the IIIf, without the slow speed dial