Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 739:
COLLECTION OF BACK OF THE BOOK ESSAYS AND PROOFS: 1916- 32, Postage Due, Official and Obligatory Tax stamps, group of 74 imperforated essays or proofs on four pages from a Collection, including 42 singles and 8 blocks printed on thick, wove or glossy paper, fresh and nice, VF and rare group, Est. $800-$1,000
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