Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 700:
1937, King George VI, Mufti issue, large die proof of 3c in bright carmine on India paper placed on sunken die large card, imprint at bottom reads: ”H.M. King George VI. X- G-649. Canadian Banknote Company, Limited”, proof size is 80x87mm, fresh, VF and rare, NSSC 194dp8, C.v. US $1,200, Est. $700-$800, Sc. #233
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