Shutter speeds 1 to 1/2000, "B"
New unique feature in APK is the possibility for full manual control: around rewind knob is dial for A=Autoexposure and manual speeds 1 - 1/2000s. Metering works also with the manual speeds!
In style with the other Zenits in this series (Avtomat, AM, AM2 etc) the control around shutter release button is L=Lock, E=single manual speed for flash sync and B=Bulb.
APK has no battery check nor self timer, but has double exposure. It also has reminder slot for film package end in the bottom.
Total manufacture 6394 pcs.

Comes with one of thes 3 lenses:
Helios 44k-4 (most typical), or Zenitar-K 2/50 or Zenitar-K-2 2/50 Few with Zenitar-K 1.9/50 also