Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 648:
1941, Waterlow definitive re-issue, Caribou, 5c violet, die I, imperforated block of four with large security punch in the middle and small holes on each value, full OG with minor violet ink offset, NH, VF, Unitrade #257vii, C.v. CAD$450++, Est. $150-$200, Sc. #257 imp
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