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Type: stamp Issuer: Brazil Date: 1988 Denom: ? Visibility: public Image owner: none postage 5/16/1988 50.00cz multi issue=Americas Telecom 88 unwmk perf=11.75x11 Crops No visible images cropped from this one. Measurements Resolution is unknown. Source Source name: Colnect File URL: http://i.colnect.net/b/2359/010/Concentric-radio-waves-over-the-American-Continent.jpg Uploaded September 5, 2015, 2:18 am by Stan Shebs