Published in Autumn 1987 Zeiss Historica Journal
Author: Hans-Juergen Kuc
See Page 10
A pictorial of three unusual lens pictures. 1. A “Special Production Tessar, 2. an “Unsaleable” Tessar lens that was none the less mounted in a shutter and sold, and 3. three “Muster-Sonnar” lenses which were early prototypes of COntax lenses.
To go to the Journal itself, click on the year 1987 in the first line above.