It is with a secret mark, could it be a #156f, but this Scott-number is only for a imperforated pair? I canīt find this single one in the Scott catalogue.
The Banknote stamps (National, Continental, American) were perforated with width/height variations to produce some "Jumbos" which could be trimmed to fake the imperforate single. This is one reason that the imperforate single is not listed/priced, and that multiples are needed to demonstrate the imperforate error.
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Posted 11/29/2021 09:27 am
