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| navigate by keyword : 1994 aged antique blue canceled collection communication correspondence culture discovery envelope german germany historic history hobby issue letter mail man map mark max nobel old philatelic philately physicist physics planck post postage postal postcard postmark prize quantum research retro science scientist series stamp technology theory used vintage |
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| MADRID, SPAIN - MARCH 1, 2020. Vintage stamp printed in germany shows blackbody radiation, Discovery of Quantum theory, by Max Planck, a German theoretical physicist, Nobel Prize in Physics in 1918 |
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Stockphotos.ro (c) 2025. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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