A Echophon which can record calls
A Echophon which can record calls and voice mails. The inventor Louis Blattner (right). Blattner Studio / Elstree. 11th October 1929. Photograph
Picture No
10964488
Media ID
46086926
Size
3543px x 2704px
(1.9MB)
Credit
Mary Evans/brandstaetter images
Source
Photograph - Anonymous
Date
1929





























