The first model was produced in the 6.5 x 9 cm size with either an f3.5 or f4.5 lens. The shutter was largely enclosed by a metal cover on the camera front. The 1931 BJA states that the mirror mechanism has been changed and is now hand-raised rather than being lifted by a spring.

A second model was released in 1932. This had a bezel surrounding the shutter that carried secondary scales for the speed and aperture. The camera had either a fixed or revolving back and a magnifier in the focusing hood. Later a version for 9 x 9 cm plates was introduced.

The cost of the first model was £19.15.0.

In the down position the back of the mirror forms a light-tight chamber allowing the draw slide of the dark-slide to be removed. The front of the mirror connects to the focusing screen by black cloth preventing light entering through the hood as the mirror is raised,. When the mirror is lowered an arm opens the shutter blades, when the release trigger is pressed the arm closes the blades, a second arm fires the shutter. The inside of the camera is corrugated to deflect stray light.