1. The Inverted Jenny: A Rarity Among Rare StampOnly 100 in existence, this 1918 stamp features an upside-down biplane. 2. The Treskilling Yellow: Swedish Philately's Crown JewelA 1855 misprint turned a 3-skilling stamp into a golden rarity.
1. British Guiana 1c Magenta: The World's Most Valuable StampA sole surviving 1856 stamp sold for $9.5 million in 2014. 2. The Basel Dove: Switzerland's Elegant 1845 Postal MasterpieceFirst tricolor stamp worldwide, a symbol of Swiss precision
1. Penny Black: World's First Adhesive Postage StampIssued in 1840, this classic British stamp revolutionized postal systems. 2. The Hawaiian Missionaries: Philatelic Gems from the PacificRare 1851 stamps, commemorating Hawaii's early missionary efforts.
1. Z Grill: America's Grill-Embossed EnigmaThe rarest U.S. stamp, with a unique grill pattern from 1868. 2. The Mauritius "Post Office" Stamps: Tropical Island RarityMisprinted "Post Office" instead of "Post Paid," creating philatelic history.
1. Cape of Good Hope Triangulars: Angular Beauty from 1853Iconic triangular stamps, symbolizing South Africa's postal history. 2. The Chinese Red Revenue Small One Dollar: Qing Dynasty MarvelA 1897 stamp reflecting China's transition into the modern era.
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