6c Dull Brown (256). Mint N.H. bottom imprint and plate no. 28 block of six, rich color, tiny natural gum skip bottom left stamp and natural gum bends, some perf separations confined mostly to selvage

FINE. AN EXTREMELY RARE MINT NEVER-HINGED PLATE BLOCK OF THE 6-CENT UNWATERMARKED BUREAU ISSUE. THIS IS THE FIRST WE HAVE OFFERED SINCE KEEPING COMPUTERIZED RECORDS.

A review using Power Search revealed only one Mint N.H. multiple we have offered since 1997 and in all Rarities of the World sales, and that was a block of four. While we have offered approximately five plate blocks of six (all bottoms except one, most with margins close or touching at left), this is the first in Mint N.H. condition

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