Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - China - 1946, C.N.C. double black surcharge $100 on Hong Kong printing of $2 light brown, left sheet margin vertical pair on paper without watermark, unused, no gum, VF and scarce in pair, Chan #A51a, SG #823a, £1,200++, Est. $700-$800, Scott #C51 var