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CCV = 2012 CSA Catalog Value
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Item# 18360
Price: $650
CSA 11-KB, 10¢ deep blue block of 4 with Mysterious Number “605” in position 60 right sheet margin. Possibly unique block written up in a Kaufmann article in the 2Q 2019 Confederate Philatelist, tested forensically. See article on Kaufmann website. $650.