The two original Tengors - 54/2 and 54/15 - were produced by Goerz before the merger into Zeiss. They had an all leatherette finish, two vertically arranged finders and the film-advance knob at the bottom of the side panel. Following the Zeiss merger the new company's logo was added to the camera front. In 1929 the camera was re-styled, two close-up lenses were added. The finder windows were arranged horizontally across the top of the camera and the film-advance knob moved to the top of the side panel.

In 1932 the front of the camera gained a bevelled edge and a hexagonal surround to the lens. The controls for aperture and focusing were moved to the front panel. The model 54 had a single close-up lens. The 55/2 had a linkage between the shutter and film-advance.

Box Tengor Models

According to Tubbs the Erabox was the Baldur camera, renamed in 1938.