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Type: stamp Issuer: Russia Date: 1946 Denom: ? Visibility: public Image owner: none postage 5/25/1946 60k grayblk issue=125th Birth Anniversary of Pafnuty Chebyshev d=Chebyshev 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/192/874/Pafnuty-L-Chebyshev-1821-1894-Russian-mathematician.jpg Uploaded August 25, 2014, 6:12 pm by Stan Shebs