Image Colnect-3168-983-Charles-Steinmetz-and-Curve-on-Graph.jpg
(1024 x 661 pixels) |
Type: stamp Issuer: United States Date: 1983 Denom: ?
Visibility: public Image owner: none postage 9/21/1983 20c multi dt=American inventors d=Charles Steinmetz 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/3168/983/Charles-Steinmetz-and-Curve-on-Graph.jpg Uploaded May 19, 2016, 1:20 pm by Stan Shebs |
