I personally don't know how images were duplicated that long ago (in terms of type 3 images) Enlargement and contact are the only ways I know of that existed to make duplicates and I believe both needed a negative.
I know to actually get the photos into the papers/publications you had to turn the image into a halftone.
I'm not familiar with the process of creating a copy from a duplicate negative. And I can't find how it was done.
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