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Type: stamp Issuer: Mexico Date: 1974 Denom: ? Visibility: public Image owner: none airmail 10/7/1974 2p multi issue=1st International Electrical and Electronic Communications Congress wmk=MEX & eagle perf=14 Crops No visible images cropped from this one. Measurements Resolution is unknown. Source Source name: Colnect File URL: http://i.colnect.net/b/2956/460/First-International-Congress-of-Electric-Communications-and-.jpg Uploaded July 1, 2016, 7:05 pm by Stan Shebs