Air Post - Surcharge

6 k 1961

USSR

Surcharge on Sg:SU 2421 - Typo overprint in black - (1961г. 6 коп.)

Air Mail

Air Post - Surcharge	Helicopter Mil Mi-4 over Kremlin 0.2$	Flight Over Zemo-Avchal Hydroelectric Station 0.73$	Flight Over Collective Farm Fields
Flight Over Sochi 14$	Flight Over Leningrad	Flight Over Far East	Flight Over Moscow 5.8$
Flight Over the Arctic 2.9$	Aeroflot's Airline Route Map 4.6$	Black surcharge on 1923 USSR stamp (SU XV) 2.4$	Black surcharge on 1923 USSR stamp (SU XVI) 2.4$