Published in Autumn 1998 Zeiss Historica Journal
Author: Larry Gubas
See Page 23.
Sometimes, a collector will run into a Zeiss Ikon device that has no trademarks of any sort. Yet it is clearly a Zeiss Ikon product. The reason this is so is based on where it was to be sent.
To go to the Journal itself, click on the year 1998 in the first line above.