10c Blue, Special Delivery (E5). Bottom imprint and plate no. 77 block of six, original gum, left stamps Mint N.H., others lightly hinged, rich color, well-centered, light pre-printing paper fold thru positions 4-5, reinforced perf separations in selvage, also few separations at right, Very Fine example of this scarce plate block, ex Curtis, with 1999 P.F. certificate

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