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

Canada - Modern Errors and Varieties

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Start price: $600

Buyer's premium:

1969, Christmas, Children Praying, plate proofs of 5c and 6c in issued colors, horizontal strip of four (pair of 5c and pair of 6c) with vertical gutter between pairs, printed on thick glazed paper with markings on the gutter, no gum as produced, NH, VF and rare, ex-G.D. Mass and ”Mount Royal”, Est. $1,200-$1,500, Scott #52-3