September 2008 Society Auction

Lot 10. Imperforate full pane #47 (10x10) in gray (unissued color) as sunken die proof. 12 x 15 1/8 inches. On very heavy cardboard with French word ESSAIS below pane in border. Corners (lower right and left) damaged; some toning. Ex: Dickason. In correspondence with Dickason, the seller, Stanley Gibbons, in 1973 asked $500.00 per proof. Letter available. Very rare.