| Issuer | Italy |
| Year | 2009 |
| Type | Non-circulating coin |
| Value | 20 Euros |
| Currency | Euro (2002-date) |
| Composition | Gold (.900) |
| Weight | 6.451 g |
| Dimensions | 21 mm |
| Thickness | |
| Shape and Technique | Round Milled |
| Orientation | Medal alignment ↑↑ |
| Engraver(s) | |
| In circulation to | |
| Reference(s) | KM#320 |
| Obverse description | Portrait of Guglielmo Marconi inspired by a period image; on the left, in the background, the yacht and floating laboratory `Elettra`. Below the portrait, in exergue, the sign of Marconi and below the name of the author. |
| Obverse script | |
| Obverse lettering | REPUBBLICA ITALIANA
Guglielmo Marconi
U. PERNAZZA (Translation: Italian Republic) |
| Reverse description | A radio receiver with rhomboidal antenna catching radio waves, the same of many radios created in Italy in the first half of the twenties. At right the value while the mintmark is at left. Dates of the anniversary are below, and above all is the logo of the European Star Programme. |
| Reverse script | |
| Reverse lettering | 20 EURO 1909 2009 R GUGLIELMO MARCONI·NOBEL PER LA FISICA |
| Edge | Milled |
| Mint | R Rome, Italy (476-date) |
| Mintage | 2009 R - Proof - 2 598 |
| Catalog ID | 3657693660 |
| Comments |
