| Issuer | Italy |
| Year | 1974 |
| Type | Pattern |
| Value | 500 Lire (500 ITL) |
| Currency | Lira (1861-2001) |
| Composition | Silver (.835) |
| Weight | 11 g |
| Dimensions | 29 mm |
| Thickness | |
| Shape and Technique | Round Milled |
| Orientation | Coin alignment ↑↓ |
| Engraver(s) | Obverse: Pietro Giampaoli Reverse: Guerrino Mattia Monassi |
| In circulation to | 28 February 2002 |
| Reference(s) | KM#Pr91 |
| Obverse description | Bust of Guglielmo Marconi facing left, with below the name of the authors |
| Obverse script | Latin |
| Obverse lettering | REPVBBLICA ITALIANA
GIAMPAOLI
MONASSI INC • (Translation: Italian Republic) |
| Reverse description | Waves that spread from the radio towers of the Peninsula. On the left the value with PROVA under it; to the right the mintmank and down the two dates of the centenary. |
| Reverse script | Latin |
| Reverse lettering | GVGLIELMO MARCONI L 500 PROVA R 1874-1974 |
| Edge | Lettering in relief |
| Mint | R Rome, Italy (476-date) |
| Mintage | 1974 R - - 730 |
| Catalog ID | 7880743520 |
| Comments |
