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

British Commonwealth - Australia - Official stamps

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Start price: $400

Buyer's premium:

1918-23, small perfin ”O S” on King George V 1s4p turquoise blue, perforation 14, watermark Wide Crown Narrow A, misperforated block of four, bottom right stamp with wide ”1” at right, full OG, NH, VF and rare multiple, J. Bozic certificate, SG #O75 var, Brusden-White #128A, ba, n, C.v. A$1,725 as singles, Scott #OB37 var