A diptych, taken with the Chaika II. To be honest, Chaika II is almost made for diptychs, because it’s a half-frame camera. This means that instead of one shot you can take two; while using regular 35mm film you can shot twice as many photos as with a regular camera.
Diptych is a picture that has two parts.
If you’re interested in this camera, you may read more (and look at the photos) on the Chaika II camera page.