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Series: Bicentenary of Academy of Sciences
USSR, 1925, 3 kop. 12 (1/2), 13 (1/2) x 12 (1/2), 12 (1/2) x 12, 13 (1/2). brown
Catalogues: CFA "Souzpechat": 227Michel: 298Scott: 326Stanley Gibbons: 456Yvert et Tellier: 340
Artists: Miropolsky Leonti
Plots: Lomonosov Mikhail