 |
What: stamp
Type: United States postage 7/10/1973 6c multi issue=Progress in Electronics dt=electronics progress d=Marconi spark coil & gap unwmk perf=11 State: used Visibility: public Owner: Stan Shebs |
Creation date unknown |
| |
What: stamp
Type: United States postage 7/10/1973 6c multi issue=Progress in Electronics dt=electronics progress d=Marconi spark coil & gap unwmk perf=11 State: used Visibility: public Owner: Stan Shebs |
Creation date unknown |