The 1918/7-S Standing Liberty Quarter Overdate is one of the most important varieties and rarities of its entire century. It was found relatively quickly in the 1930s and sold at auction for the first time in 1937. This coin is rare and valuable in the poorest of grades. The value increases gradually into Mint State, where it is extremely rare, until it takes a jump into the gem level. MS65 and finer would be considered nearly unattainable rarities.
| coinage-type | Standing Liberty quarter |
| desg | MS |
| designer | Herman A. MacNeil |
| diameter | 24.3 |
| edge | Reeded |
| fineness | 0.9 |
| material | 90% silver; 10% copper |
| mint-mark | S |
| mintage | 11,072,000 |
| ngc-id | 243A |
| obverse-description | MacNeil's Liberty stands with one hand holding an olive branch, the other bearing a shield. A ribbon connects the branch to the shield. The world LIBERTY appears across the top periphery and the date is centered at the bottom. 13 stars appear to the side of Liberty. Mint mark, if any, is positioned above the date to the left of Liberty. |
| pcgs-link | 5726 |
| pcgs-number | 5726 |
| reverse-description | An eagle in full flight, facing right, with UNITED STATES OF AMERICA above the great raptor. Stars flank the left and right peripheries with the words QUARTER DOLLAR at the bottom. |
| weight-grams | 6.25 |
| weight-ounces | 0.1808 |
| year-display | 1917-1930 |