Published in Spring 2000 Zeiss Historica Journal
Author: Jack Kelly
See Page 7 -9
The author analyses the rational behind the serial number sequences with regard to the Zeiss prism binocular models, describes a series of different external characteristics found in a particular model based on markings, differences in eyepieces and different prism covers.
To go to the Journal itself, click on the year 2000 in the first line above.