There were several variations of this detective camera, this example is a later model fitted with a removable changing box.

Eder states that the camera was marketed from 1887. On early models the shutter was set by pulling a string, later it was set by a knob on the camera front. The aperture adjustment slot on the front of the camera was, at first, horizontal later diagonal, this corresponds with the change to the shutter setting. The changing box was made removable from around 1892. Different backs could be attached for plates, dark-slides or roll-film. Several sizes were produced including 9 x 12 cm, 12 x 16 cm, 13 x 18 cm and 8.5 x 17 cm stereo.