RUSSIA (1930) Worker with sledgehammer and machine*. Biplanes in sky*. Postal card (O) with illustrated advertising "Join the ranks of the Osoaviakhima!" (Society for the assistance to defense, aviation and chemical construction of the USSR).
AVAILABLE AT $50
U.S.A. (1949) Single engine sky-writer airplane*. One cent bicolor postal card (O) with advertising: "Duplex Envelope Company."
AVAILABLE AT $15
U.S.A. (1950) Airplane*. One cent postal card (O) with advertising. "Eastern Airlines."
AVAILABLE AT $15
RUSSIA (1931) Biplanes flying over tractor*. Postal card (O) with illustrated advertising "The fifth Osoafiakhim lottery will give 25,000,000 rubles towards strengthening USSR defenses!"
AVAILABLE AT $50
RUSSIA (1933) Biplanes. Auto. Tank. Tractor. Illustrated postal propaganda card (O). Results of the 6th lottery.
AVAILABLE AT $50
RUSSIA (1933) Plane. Train. Illustrated postal propaganda card (O). Airmail Accelerates Postal Delivery!
AVAILABLE AT $50