Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1100:
1909, perforated proof of 10k in bright blue, bottom right corner margin single printed on wove paper without varnish lines, three instead of two lines of inner oval, extra two curls on sides of top ribbon (common stamp has three lines) and other differences from issued stamp, nice condition, no gum as produced, VF and scarce, expert’s hs on margin, Est. $750-$1,000, Sc. #79
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