Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 29:
1973, Progress in Electronics, 11c multicolored, bottom sheet margin single with olive color omitted and only traces of vermilion presented, full OG, NH, VF, C.v. $1,000, Est. $350-$400, Sc. # C86a
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