To commemorate the centennial of Americas involvement in World War I and honor the over 4 million men and women from the United States who served. This set includes a proof silver dollar and a proof silver Air Service Medal.
| coinage-type | Medal |
| desg | PR |
| diameter | 38.1 |
| edge | Plain |
| fineness | 0.9 |
| material | 90% silver; 10% copper |
| mint-mark | D |
| obverse-description | The obverse design depicts an iconic SPAD XIII, a World War I fighter flown by many Americans and valued for its speed, strength, and firepower, viewed from the top and side. The inscription SPAD XIII identifies the aircraft. |
| pcgs-link | 659618 |
| pcgs-number | 659618 |
| reverse-description | The reverse designs depicts the Military Aviator Insignia. Inscriptions include CENTENNIAL OF WORLD WAR I, 2018, OVER THERE!, AIR SERVICE, and AMERICAN EXPEDITIONARY FORCES. |
| variety | World War I Centennial - Air Service |
| variety-2 | Silver |
| weight-grams | 26.73 |
| weight-ounces | 1 |
| year-display | 2018 |