1843 10c black, "Double Geneva" composed of right half at left and left half at right ("interverti"), large margins on three sides, cut in at top, with some gum soaks at left, tied by red cancels on outer folded letter from Celigny, with straight-line departure handstamp alongside, addressed to Prof. Cherbuliez-Munier in Geneva, with red 13 Sept 46 arrival pmk below, cover with filing folds away from the stamps, handwritten notation "gekauft von Karl Irmer Zurich, 11 Jan 1905" on reverse, fine example of this iconic Swiss rarity, with 1977 Friedl certificate, cat. $100000 (Cat No. 2L1b) (Image)

Cat. $100000, Est.US$10,000