Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2

China

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Start price: $100

Buyer's premium:

1946, Dr. Sun Yat-sen, $20 blue green, rough perforation 12½, top right corner sheet margin plate No. vertical strip of three imperforated at top and between stamps, no gum as issued, NH, VF, Chan #622e, Est. $150-$200, Sc. # 519 var