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Zeiss Ikon Model and Size Numbers

From 1927 to 1960, Zeiss Ikon used XXX/YY system to indicate the camera model. Left digits (XXX) shows camera model, and the right ones (YY) shows the negative size. The last digit of the left number (XXX) was usually incremented by one if for new or improved model.

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Example:

Zeiss Ikon Ideal 9x12cm -> 250/7

Zeiss Ikon Ideal 6.5x9cm -> 250/3


The table below gives the model numbers of most of Zeiss Ikon cameras:

The next table gives the size numbers used on Zeiss Ikon cameras and in some cases the focal length of the most usual lens for the format :

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