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Type: stamp Issuer: United States Date: 1976 Denom: ? Visibility: public Image owner: none postage 4/6/1976 13c multi issue=Chemistry d=lab glassware unwmk perf=11 Crops No visible images cropped from this one. Measurements Resolution is unknown. Source Source name: Colnect File URL: http://i.colnect.net/b/4845/760/Chemistry-Flasks-Separatory-Funnel-Computer-Tape.jpg Uploaded April 2, 2019, 1:42 am by Stan Shebs