Colnect-173-082-Diffusion-of-Hertzian-Waves.jpg
Source: Colnect
Issued by: Portugal
Function: postage
Date: 9/4/1974
Issue: Centenary of the Birth of Marconi
Denom: 1.50e
Color: multicolored
Design:
Watermark: unwmk
Perf: 12
Catalog value:



External links:
Colnect 64999-..lielmo_Marconi