Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1

Canada - Queen Victoria ''Numeral'' issue

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Start price: $500

Buyer's premium:

1902, 7c olive yellow, nicely centered block of four, bottom left stamp with pin-point natural inclusion and tiny gum wave, full OG, NH, VF and scarce, Unitrade C.v. CAD$3,600 as singles, Scott #81