Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 309:
Description
1937, Mufti issue, large die proof of 5c in blue on India paper placed on sunken die reduced size card, imprint at bottom reads: ”H.M. King George VI. X-G-634. Canadian Banknote Company, Limited”, proof size 83x87mm, fresh, VF and rare, Minuse and Pratt #235P1, NSSC 196dp1, C.v. US$1,200, Est. $500-$600, Scott #235
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