Image Stamp_US_spark_coil.jpg
(360 x 230 pixels) |
Type: stamp Issuer: United States Date: 1971~1977 Denom: ?
Visibility: public Image owner: none postage 7/10/1973 6c multi issue=Progress in Electronics dt=electronics progress d=Marconi spark coil & gap 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/8/81/Stamp_US_spark_coil.jpg Uploaded November 25, 2012, 3:59 pm by Stan Shebs |
