Obverse
Guglielmo Marconi facing; pointed star and the name of the engraver below
Lettering: REPVBBLICA ITALIANA
MONASSI
Reverse
Radio transmitter antenna invented by Marconi with in the high vertex a representation of a radio wave; denomination, mint mark and word prova at right, dates at left
Lettering: PROVA
1874 1974
L.100
GUGLIELMO
MARCONI