Gilbert/Köhler, Auktion 003, 1908-11 'Koch', #ad, Dt. Kolonien AUT-Gotlib Harmer Stamp Auctions New York

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inside cover added as a copy

Handbuch der Luftpostverbindungen zwischen Europa und Asien bzw

Gilbert/Köhler, Auktion 003, 1908-11 'Koch', #ad, Dt. Kolonien AUT-Gotlib Harmer Stamp Auctions New YorkGilbert & Khler, Paris, 3me Vente, Hotel Drout, 23. 28. 11.(1908), Superbe Collection de Timbres Poste Allemagne et ats, Colonies Allemandes, REPRINT by Walter Kruschel 1974, with a foreword by him about the rarity and importance of the catalogue of the G. Koch collection, Gieen, the first important auction of an Old German collection, approx. 1000 lots, 11 plates, including numerous Old German rarities, the results were recorded, edition allegedly