#314A, 4c Brown imperforate, an exceptional used example of this important 20th century rarity, being one of the very few existing copies showing full characteristic Schermack Ty. III private perforations on both sides (many are found with perforations on only one side, or none at all), rather well centered overall, rich luxuriant color, typical neat wavy line machine cancel, small corner crease at bottom left and a small scuff at bottom confined to outer edge and not at all affecting the design in any way, otherwise fine for this; certainly one of the rarest stamps of the twentieth century; 2016 PF certificate.
Sold for US$21,0000
By Spink – Auction 154
The Philatelic Collector’s Series Sale Lot: 273 on May 11-12, 2016