Published in Autumn 2004 Zeiss Historica Journal
Author: Pierpaolo Ghisetti
See Page 5.
An outgrowth of the Box Tengor, this 2 ¼” x 2 ¼” format was a box camera with a twin lens style viewing process. It was made during the war years and sold mostly in Sweden and Germany.
To go to the Journal itself, click on the year 2004 in the first line above.