Diffusion of Hertzian Waves 1.50 $ — Portugal, 1974
Diffusion of Hertzian Waves (Portugal, 1974), face value 1.50 $, “Centenary of the Birth of Marconi” series. Photo, catalogue value, details and photo…
- Series
- Centenary of the Birth of Marconi
- Issue date
- 1974
- Face value
- 1.50 $
- Colors
- Multicolor
- Print run
- 9,000,000