Just thought of one other thing to look at. Since albumen prints are made from laying the photographic paper on the glassplate negative, all first generation albumen photos from the same glass plate negative have to have player images that are exactly the same size. If the SRA CdV is second generation then there is a possibility that the player images are of a slightly different size than the one in the LOC. If they are I would think that this would be a huge red flag.
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