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Type: stamp Issuer: Russia Date: 1965 Denom: ? Visibility: public Image owner: none postage 6/15/1965 4k multi issue=IUPAC Congress 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/4136/531/20th-International-Congress-of-Pure-and-Applied-Chemistry.jpg Uploaded June 19, 2017, 11:56 pm by Stan Shebs