USSR 1927 Xth Year Soviet Construction Temporary Postmark - Very rare

SOVIET TEMPORARY POSTMARK: 10th ANNIVERSARY OF SOVIET CONSTRUCTION

1927 (14 November) - Soviet advertising postal stationery "CRIMEA THE PEARL OF U.S.S.R", 7k red, indicium cancelled with the Temporary postmark of the 10th Anniversary of Soviet Construction Exhibition. Special hexagonal handstamp struck below. Reverse blank. Very Fine.

Very rare, those postmarks were absent from I. Vovin official postmarks´ listing published in the 1960s.

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