Published in Autumn 2003 Zeiss Historica Journal
Author: Charles Barringer
See Page 11.
Zeiss Oberkochen also made Tessar lenses in the M39 mount usually associated with the Leica but in this case this mid-1950s lens was for a Braun Paxette camera.
To go to the Journal itself, click on the year 2003 in the first line above.