10c U.S. Postal Service Bicentennial, Block of Four, Red 10c Omitted (1575b) Mint N.H. block of all four designs, slight fingerprints on gum and small gum inclusion top left stamp, centered to top as are all known examples, few perf separations at right, Fine and extremely rare, Datz states only 6-8 blocks known, this is the first block we have offered since keeping computerized records, listed but unpriced in Scott, Datz value

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