Lot 407
1917, 20¢ light ultramarine, double impression (515c), right margin vertical pair, original gum never hinged. Natural straight edge at top, natural gum wrinkles, natural perf at top. Fine.
Scott $2,500
A MOST STRIKING AND RARE ERROR; WE HAVE SEEN ONLY TWO OTHERS, A PLATE BLOCK AND A SINGLE, CERTIFIED BY THE PF.
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| Realized $2,900 |
