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Type: stamp Issuer: Russia Date: 1956 Denom: ? Visibility: public Image owner: none postage 6/4/1956 40k blkbrn issue=Lobachevsky death 100th d=Lobachevsky 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/193/155/Nikolay-I-Lobachevsky-1792-1856-Russian-mathematician-.jpg Uploaded August 25, 2014, 11:57 pm by Stan Shebs