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One-cent magenta enters spotlight at Gibbons HQ as 'pieces' sold via Showpiece - Canadian Stamp News
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$9.5-Million British Guiana One-Cent Black on Magenta Stamp is World's Most Expensive Object by Weight - TechEBlog
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British Guiana one-cent magenta sale to confirm status of world's rarest stamp | Stamps | The Guardian
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COPPS outbid for British Guiana 1¢ Magenta and the Inverted Jenny block! - City of Preston Philatelic Society (COPPS)
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The British Guiana One-Cent Black on Magenta | Three Treasures – Collected by Stuart Weitzman | 2021 | Sotheby's
![Smithsonian Insider – Seeing Magenta stamp is “once-in-a-lifetime opportunity” | Smithsonian Insider Smithsonian Insider – Seeing Magenta stamp is “once-in-a-lifetime opportunity” | Smithsonian Insider](https://insider.si.edu/wp-content/uploads/2016/06/magenta-01-1.jpg)
Smithsonian Insider – Seeing Magenta stamp is “once-in-a-lifetime opportunity” | Smithsonian Insider
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