Ibsor
Ibsor shutter with Thowe lens |
The Ibsor is a leaf shutter made since 1908 by the German company A. Gauthier in Calmbach (AGC).
The Ibsor shutter was replaced by the Prontor in 1935.
Ibsor shutter with Emil Busch Glaukar lens, image by Jaroslav Fojtik (Image rights):
http://www.penguin.cz/~fojtik/camera/ibsor.jpg