Black surcharge on 1923 USSR stamp

20 k 1924

USSR

0.97 - 1.2$

price on 15.10.2022

Surcharge on Zag:SU 012 - overprinted in black - 20k on 10r.
(20 КОП. 30Л.)

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 2.4$	Black surcharge on 1923 USSR stamp 2.4$