1921 Missouri half dollars mark the 100th anniversary of the Show-Me State's admission to the Union as the 24th state. The coins, designed by Robert Aitken, were issued in two different varieties: one with a numerical inscription 2*4 indicating Missouri's place as the 24th state and another without the marking; these are known as plain Missouri half dollars. <BR><BR> While it is unknown exactly how many 1921 Missouri 2*4 halves were distributed, but they are one of the rarest regular issues in the classic commemorative series. Most of the Missouri 2*4 half dollars are found in AU50 to MS64 grades, with MS65 rare and pieces grading MS66 or higher proving very rare.
| coinage-type | Classic Commemorative |
| desg | PR |
| designer | Robert Aitken |
| diameter | 30.6 |
| edge | Reeded |
| fineness | 0.9 |
| material | 90% silver; 10% copper |
| mintage | 1-2 Known |
| pcgs-link | 9332 |
| pcgs-number | 9332 |
| variety | Missouri 2x4 |
| weight-grams | 12.5 |
| weight-ounces | 0.36169 |
| year-display | 1893-1954 |