leonhard euler
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leonhard euler |
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| navigate by keyword : 2007 adult aged algebra ancient antique education envelope euler eyes face famous founder geometry great hair historic leonhard letter mail male man mathematician mathematics message mouth nose old people person philately physics postage postcard postmark research retro science scientist seal stamp switzerland theory vintage |
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| SWITZERLAND - CIRCA 2007: stamp printed by Switzerland, shows Leonhard Euler, Mathematician, circa 2007 |
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Stockphotos.ro (c) 2026. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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