Photograph of three Enigma machines in use

Historical photograph depicting three Enigma I machines operated by Wehrmacht personnel in an unidentified communications room. The exact location and year are unknown. The image shows three operators, each working at a machine, with two additional personnel recording messages on the right side of the frame.

A print of this photograph is featured in Tom Perera's book Inside Enigma: The Secrets of the Enigma and other Historic Cipher Machines.