Leica IIIb with Leica Mooly motor

The Leica model IIIb introduced an eyepiece diopter adjustment lever under the rewind knob. With this lever it was possible to adjust the sharpness of the viewfinder image to a person’s eyesight. However, the most important feature of this Leica is the attached Leica motor (code name MOOLY).
The Mooly clockwork motor mechanism on this early production model from 1938 is capable of driving an attached Leica camera at two frames per second for up to twelve frames. The earliest motors up to serial no. 400 had two speed motors for one or two frames per second. But by serial no. 634, the button on the front of the motor had been disabled and only two frames per second was available. The button was removed on later production motors.
Currently not on view
Object Name
date made
Ernst Leitz
place made
Deutschland: Hessen, Wetzlar
ID Number
accession number
catalog number
serial number
Leica Cameras
See more items in
Culture and the Arts: Photographic History
Leica Cameras
Data Source
National Museum of American History, Kenneth E. Behring Center
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