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Type: stamp Issuer: United States Date: 1973 Denom: 11c
Visibility: public Image owner: none airmail 7/10/1973 multi issue=Progress in Electronics d=two De Forest audions unwmk perf=11 Crops No visible images cropped from this one. Measurements Resolution is unknown. Source Source name: Wikimedia Commons File URL: http://upload.wikimedia.org/wikipedia/commons/e/e8/1973_airmail_stamp_C86.jpg Uploaded March 20, 2011, 3:25 pm by Stan Shebs |