Published in Autumn 1981 Zeiss Historica Society Journal
Author(s) Larry Gubas
See Page 10.
A short discussion about the Zeiss Ikon exposure meters of the pre-war period and how their product numbers were assigned in that era and growing into the war time and early post war examples. The first Helios meter from 1937 and the first Ikophot from 1943 (later corrected to 1941) are pictured.
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