Obverse
Bust of Guglielmo Marconi facing left, the name of the authors below
Lettering: REPVBBLICA ITALIANA
GIAMPAOLI
MONASSI INC
Reverse
Waves that spread from the radio towers of the Peninsula. Denomination with prova word at left; to the right the mintmank and down the dates
Lettering: GVGLIELMO MARCONI
L 500
PROVA
R
1874-1974
