1c-90c Interior, Specimen Ovpt. (O15S-O24S). Complete set, without gum as issued, bright colors, some scissors-separation but nearly all sides appear to have full perfs, some small flaws and a couple sides reperfed, 90c with extraneous light horizontal lines

FINE APPEARANCE. THE INTERIOR DEPARTMENT SET IS ONE OF THE TWO RAREST OFFICIAL SPECIAL PRINTING SETS TO THE 90-CENT VALUE.

Of the 3c to 90c values, between 75 and 88 were sold, for a total of 635 stamps, making the Interior Department set one of the two rarest of the 1c-90c Special Printings (the Treasury Department has 646 sold, excluding the 7c).

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