Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 777:
1945, Chambre de Commerce, Galley 50c green and 2fr lilac brown, imperforate proof panes of ten on yellowish paper, bottom right stamp of each sheet is placed upside down and forming either horizontal or vertical tete-beche pair, no gum produced, NH, VF and very rare multiples, Mi #1 II PII Kdr-2 PII Kdr, C.v. €10,000
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