Cupronickel 1 rouble of Lebedev, P.N., Moscow, 1991. 2006.9.5

Obverse: СССР/ 1/ РУБЛЬ/ 1991 - Soviet coat of arms
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Reverse: П. Н. ЛЕБЕДЕВ/ 1866/ 1912 - Half-length portrait of Lebedev facing r., with formula and scientific drawing
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