10c Brown, Without Secret Mark (187). Block of four, original gum, deep shade, top left stamp thin spots, bottom right stamp has corner crease

FINE-VERY FINE APPEARANCE. A RARE ORIGINAL-GUM BLOCK OF FOUR OF THE 10-CENT 1879 AMERICAN BANK NOTE COMPANY ISSUE WITHOUT SECRET MARK.

Brookman notes that "blocks of the Type I are extremely rare". A review using Power Search shows we offered one in our 2012 Frelinghuysen sale, one with double paper in 2002 and one centered strongly to bottom in 2001. Prior to that, one has to search back to our 1990 Rarities sale to find one.

With 1985 P.F. certificate

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