This set of two stamps was issued for the 6th International Proletarian Esperanto congress, Leningrad.
Designed by V. Kuprianov. Litho.
Perf 12 x 12 1/2.
Released July, 1926.
We have included this postcard for your interest…
“...At once authoritative and compelling." Royal Mail’s British Philatelic Bulletin |hello@philatelicdatabase.com
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