The AP and the K

The Asahi Pentax AP was the first 35mm SLR produced by the Asahi to use a pentaprism viewfinder.  The camera is named by collectors, like me, Pentax AP but actually that name was never officially documented. 
In 1958, the Asahi Pentax K, a variant of the AP was produced. The K upgraded the camera with a semi automatic diaphragm.  Both the Asahi Pentax and Pentax K were hand built cameras produced in Japan.

Film Type: 35mm
Lens Mount: M42 Screw Mount
Focus: Manual
Viewfinder: Fixed SLR Pentaprism
Shutter: Cloth Focal Plane
Speeds: B, 1 – 1/500 seconds for the AP and, 1 – 1/1000 seconds for the K
Exposure Meter: None
Battery: None
Weight: AP with lens 726 g and 577 g body only. K was a little heavier 585 without lens.