Worldwide Air Post Stamps and Postal History, One Man Collection of Tannu Tuva, Philatelic Rarities of the World, Part 2

Imperial Russia

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Start price: $750

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Description

1908, two plate proofs of 10k in blue or light blue, perforation 14½x15, printed on wove paper without varnish lines, each stamp with 3 instead of 2 lines of inner oval and with top ribbon curls different from issued stamp, both with no gum as produced, VF and rare, Est. $1,500-$1,800, Scott #79