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<p>[QUOTE=&quot;evelyb30, post: 230845, member: 36&quot;]My first thought was that it was for &quot;cropping&quot; square format negatives for printing things.&nbsp; The film is or was 2x2 inches per neg or thereabouts, and back in the day you&#039;d have used a physical mask to crop your image.&nbsp; Then you&#039;d put it into the negative carrier and slide it into the enlarger.[/QUOTE]</p><p><br /></p>

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