[QUOTE=Abravefan11;1063276]
I think the best possible scenario would be to find a printing anomaly that all subjects on one sheet shared. That's not asking for much is it?
QUOTE]
Not at all. The Piedmont 150 plate was heavily damaged in use and I believe much of that plate will be possible to reconstruct eventually.
The red Hindu backs show some similar marks, but they're uncommon enough that finding a second example to be sure it isn't just smeared ink or something transient like that is much harder. Finding the same marks on brown hindu backs would also work since that would show the plate being used for both colors.
I think other backs will show some consistent marks as well, but nothing really obvious like the scratches on P150.
Steve B
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