1927 (14 Oct) registered and flown cover from Moscow to Berlin, attractively franked with 15k single and 3x10k (Airplane over Map of the World), fine-v.f., with appropriate flight cachet and arrival pmk (15 Oct) on back (Cat No. C10-11) (Image)

Est.$250

1927 (19 Sep) registered and flown cover from Moscow to Paris, franked with 10k (rounded corner perf) and 3x15k, fine-v.f., with arrival pmk (Cat No. C10-11) (Image)

Est.$250

1931 (4 May) registered first flight picture postcard franked on both sides, red "Leningrad-Berlin" first flight cachet, with Berlin arrival pmk, v.f. (Image)

Est.$150

1932 International Polar Year, 50k and 1r used on specially prepared flown cover and card, each canceled 26 Aug (First Day of Issue) Franz Josef Land, with Archangelsk transit and Berlin arrival pmks, triangular cachets, v.f. (Cat No. C34,35) (Image)

Est.$150

1932 Polar Year, set of two used on specially printed cover and card, used from Franz Josef Land via Archangelsk to Berlin, v.f. (Cat No. C34-35) (Image)

Est.$150

1932 Polar Year, set of two used on flown cover and card, used from Franz Josef Land via Archangelsk to Moscow, v.f., with arrival pmk (Cat No. C34-35) (Image)

Est.$150

1934 (20 Oct) registered cover from Moscow to Germany, attractively franked with 80k Transport Plane and 5k Balloon, with Berlin arrival pmk on back (Image)

Est.$200

1934 (20 Oct) registered cover from Moscow to Germany, attractively franked with 20k surcharge, 15k and 30k Airship "Lenin", v.f., with Berlin arrival pmk on back (Image)

Est.$250