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Type: stamp Issuer: Russia Date: 1951 Denom: ? Visibility: public Image owner: none postage 8/15/1951 40k brn dt=scientists (1951) d=Lobachevsky (1951) unwmk perf=12 Crops No visible images cropped from this one. Measurements Resolution is unknown. Source Source name: Colnect File URL: http://i.colnect.net/b/1064/154/Nikolay-I-Lobachevsky-1792-1856-Russian-mathematician.jpg Uploaded August 22, 2014, 4:25 pm by Stan Shebs