24c Carmine Rose & Blue, 1918 Air Post (C3). Mint N.H. block of four with bottom selvage and siderographer's initials "S De B.", rich colors, Very Fine and choice, very scarce, the bottom sheet selvage with Samuel De Binder's initials was only preserved in the first printing/cutting that produced the Inverted Jenny error, subsequently the sheets were trimmed at the bottom to preserve the "Top" imprint in the top selvage, cutting off the initials, Scott value as singles

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