Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 789:
1962, Centenary of the First Hong Kong Postage stamp, 50c yellow and black color variety, full OG, NH, VF and rare, a common stamp in bister and black is enclosed, a copy of BPA certificate for a sheet of 60 (less bottom left corner block of four), reportedly the only sheet was produced with that color error, Est. $150-$200, Sc. #202 var
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