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Cert Num 1226009
Cert Date 2010-08-17
Catalog Number C1
Country USA
Year 1918
Denom 6c
Color Orange
Grade XF 90
Description Mint OGnh
Opinion it is a genuine unused, o.g., never hinged, center line block of four, the lower left stamp with a natural paper inclusion.
Cert Link http://psestamp.com/Cert/1226009