Lot
2971 
1914, 4¢ brown, S.L. watermark, horizontal flat plate coil, guide line pair, o.g., never hinged, perfectly centered, rich Post Office color, Extremely Fine to Superb; with 1977 & 2023 P.S.E. certificate Graded (XF-Sup 95, SMQ $5,250).Scott No. 446 $1,550.
AN OUTSTANDING LINE PAIR AND ONE OF THE FINEST KNOWN - ONLY FOUR GRADED HIGHER.
Realized: $4,250