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I've got a gut feeling it is the cto one
kmncd-Unfortunately, I think you are right.
The difference between a mint 57(.60), and a used 57 ($500) would clearly attract the CTOers.
The color does look rose, rather than scarlet to me. A CTOer might have thought the same thing, and put three nicely placed corner cancels not obliterating the portrait image. But as noted by Bee See, the rose paper looks superficial rather than colored straight through.
BTW, I really like the Emperor Franz Josef stamp design used on Austrian semi-postal, "Offices in Crete", and "Offices in the Turkish Empire" stamp issues. Nice stamps!
