Soviet Union 1934 Civil Aviation, 20k carmine, perforated 13 ¾:10 ¼:13 ¾:13 ¾, right sheet margin example, canceled to order, fresh, diagonal crease, still v.f. appearance, rare mixed perforation variety (Zverev $9,000)
(via Philasearch.com - Soviet Union Airmail stamps, Scott C42var)
http://ift.tt/2ppjWBd
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