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

British Commonwealth - Cook Islands - Penrhyn Islands

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Start price: $250

Buyer's premium:

1918, King George V, blue overprint on New Zealand 6p carmine, perforation 14×14½, bottom sheet margin horizontal strip of three, middle stamp without period after ”Island” variety (position R.10/8), full OG, NH (error stamp) or LH, VF and scarce, only 197 such errors possible, SG #26a, ab, C.v. £460 as hinged singles, Est. $400-$500, Scott #23, var