Lot 571
 
Canal Zone Post Office Seal, 1910, ultramarine (OX2, OX2b), complete sheet of 8 positions 2, 4, 6, 8 having the U.S. Seal watermark sheet has 1½ mm and 4 mm horizontal spacing without gum as issued inclusion in bottom left, light crease in three otherwise Very Fine a rare multiple being one of only two sheets recorded.
Scott $1,600
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