20c Madonna and Child, Horizontal Pair, Imperforate Vertically (2026b). Mint N.H. block of four with top plate no., comprising two error pairs, Very Fine, rare with only 3-6 pairs recorded in Datz, this may be half the supply and is the first example we have offered since keeping computerized records, with 1991 P.F. certificate, unpriced in Scott or Datz

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