1c Green, Perf 12 x 10 (423A). Block of four, centered to top as are virtually all known unused examples, deep rich color, natural straight edge at left

VERY GOOD. THIS IS THE ONE OF ONLY TWO UNUSED BLOCKS OF FOUR OF THE 1914 ONE-CENT PERF 12 x 10 ISSUE. A GREAT RARITY OF 20TH CENTURY PHILATELY.

Our census of Scott 423A, available at https://siegelauctions.com/census/us/scott/423A , contains nine unused singles, two vertical pairs and two unused blocks of four, for a total of 21 unused copies. The other block contains two Mint N.H. and two with tiny thins. All genuine stamps are off-center to some degree, with the perfs touching at top on all but three. The only other block known of any of the Compound Perf issues is the used block of four of Scott 423A, from the "Sirron" collection and last offered in Siegel Sale 1209 (lot 1261).

Census no. 423A-OG-BL-01. With 2003 P.F. certificate. Listed but unpriced in Scott as a block. Scott value as four singles

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