Published in Spring 1981 Zeiss Historica Journal
See Page 10
This preliminary work attempted to isolate the catalog or product numbers of the various camera models of Zeiss Ikon. It was later expanded to a book sized index of all Zeiss Ikon photographic product numbers. The first edition was for all prewar products, the second edition was for all post war products including the acquired catalog of Voigtlaender and lastly a third edition combining the pre and post war data. This was distributed to all new members of the Zeiss Historica Society. Maurice Zubatkin and Philip Laycock were the collectors and organizers of this data.
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