Pioneer Flight Covers. 1887, pre-printed cover with text at top reads: ''Airship Construction Department. Russia'' (Prof. Dmitry I. Mendeleev was the Head of that Department), sent from St. Petersburg to Berlin, franked by 7k blue, addressed to Hermann Moedebeck, an Aeronautics Pioneer, all appropriate markings, VF and undoubted aerophilately rarity (Image)

Pioneer Flight Covers. October 30, 1924, FFC from Moscow to Tehran, franked by two surcharged values, three-line red boxed confirmation marking and violet ''Mit Luftpost'' cachet, Tehran arrival ds, VF (Image)

Pioneer Flight Covers. August 28, 1932, Franz Josef Land - Arkhangelsk First Flight postcard and cover, addressed to Moscow, franked by International Polar Year of 50k carmine and 1r green respectively, all appropriate markings and arrival ds, mostly VF (Image)