Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 133:
Description
1931 (October 2-29), Colombian stationery envelope 4c ultra, uprated by five Soviet stamps, sent by registered mail by Pioneer Flight en route Leningrad-Berlin on October 2 with Berlin arrival of October 3, forwarded to Colombia by a steamship, received in Buenaventura on October 27 and posted on SCADTA Flight to Cali with final arrival on October 29, appropriate label is on front, mostly VF, Est. $200-$300, Scott #430, 434, C22a
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