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SCOTT NO
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2637a-b A922
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DATE OF ISSUE
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2010 Mai 13
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FACE VALUE
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5.50k
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COUNTRY
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Sweden
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DESCRIPTION
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This stamp shows electron microscope photographs of Silicon.
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VARIATION DESCRIPTION
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This block was issued on the occasion of Bicentennial of Karolinska Institute. It shows electron microscope photographs of silicon and selenium.
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MINERAL
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Silica
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VARIATION
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Block
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