Photograph of an Enigma machine in use

A photograph of an Enigma I machine operated by Wehrmacht personnel in a tent. The stamp on the back: "Kopiert bei FotoHildenbrand Göppingen" (Copied at FotoHildenbrand Göppingen) suggests the photograph was taken in Göppingen, in southern Germany. Writing on the back reads: "Ein Funkspruch wird verschlüsselt" (A radio message being encrypted). The Enigma operator is photographed keying letters into the machine. The man on his left looking over him is possibly writing down the message. The photograph has scalloped edges, typical of photographs of the period.