Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 421:
1966, Sultan Hussein, trial black instead of blue bilingual surcharge 5fi on 5c brown, left sheet margin block of six (2×3), full OG, NH, VF, SG #53/67 footnote, Mi #55b, €900++, Est. $300-$400
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