Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 995:
Description
1891-94, Arms in Oval, group of 15 imperforate proofs, different colors on various paper, no gum as produced, F/VF, some experts considered these stamp as issue for collectors, C.v. $600, Est. $400-$450 , Schmidt #6 footnote
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