1851-O Seated Liberty Half Dollar
Circulation strike struck at the New Orleans Mint · 402,000 made
- Mintage
- 402,000
- Metal
- 90% silver, 10% copper
- Weight
- 13.36 g
- Diameter
- 30.6 mm
Original illustration. Tap to flip. Not a photograph of the actual coin.
Face value · Metal value · Small premium · Collector premium · Significant rarity. We use bands because prices change daily.
What is an 1851-O Seated Liberty Half Dollar worth?
It's scarcer than a typical date, so even circulated examples sell above face and above their metal value. The best uncirculated coins are where the money is.
What would make yours worth more:
- Uncirculated condition with full original luster
- A die variety or minting error
- Certification by PCGS or NGC, which buyers expect for scarce dates
For market prices, check recent sold results for certified coins in the same grade.
Quick answers
- Is the 1851-O Seated Liberty Half Dollar rare?
- Yes. Only 402,000 were made, 42nd lowest of the 116 regular issues in the series.
- Is the 1851-O Seated Liberty Half Dollar silver?
- Yes. It's 90% silver, 10% copper and holds 0.3866 troy ounces of pure silver.
- Where is the mint mark on an 1851 Seated Liberty Half Dollar?
- On the reverse, below the eagle. Philadelphia halves have no mint mark. On this coin the mark is O, for New Orleans.
- Which New Orleans dates near 1851 are scarcer?
- The 1853-O, No Arrows at 4, the 1852-O at 144,000. So the 1851-O is on the scarcer side for those years.
- How many 1851-O Seated Liberty Half Dollar coins were made?
- 402,000.
What to check on your 1851-O
- Make sure the mint mark really is a O. A worn or filled mark can be misread. It's what separates your coin from the 1851 (200,750 made).
- Check the date and mint mark under magnification for tooling or added letters. Scarce dates are the ones forgers alter.
- Don't clean it. Cleaning leaves fine scratches and an unnatural shine that collectors avoid.
- Old coins pick up damage over a long life. Look for holes, bends, scratches or signs of cleaning before you judge the grade, because a damaged coin sells for a fraction of a problem-free one.
- Judge the grade under good light. LIBERTY on the shield is the benchmark for Fine. Check the high points of Liberty's knees and breast.
Never clean it. Collectors pay strong premiums for original surfaces and natural toning on a date like this. A cleaned coin can lose half its value or more. Low-mintage dates attract altered and counterfeit coins. Check that the mint mark and date have not been tooled or added, or buy one already certified by PCGS or NGC.
The story of the 1851-O
Production at New Orleans fell off a cliff in 1851. Only 402,000 were made, against 2.5 million the year before. That drop is why the 1851-O is the one people look for. In 1852 the figure was 144,000.
It was the big producer of the year, well ahead of 1851 (200,750). In the whole series, its mintage sits closest to the 1841-O (401,000) and the 1874-S (394,000).
Across New Orleans's 24 Seated Liberty Half Dollar issues, the hardest to find is the 1853-O, No Arrows with 4 made. The 1851-O is on the scarcer side of the middle. Within the 1850s it's 9th smallest of 26, between the 1850 (227,000) and the 1858-S (476,000).
Gobrecht's seated half and New Orleans output (1839 to 1852)
The Seated Liberty half dollar arrived in 1839. The earliest coins lack drapery at Liberty's elbow, while later 1839 coins show the added folds of cloth. From 1840 New Orleans produced halves every year of the period, often outstripping Philadelphia, with the mint mark below the eagle. New Orleans struck 3,180,000 in 1848 while Philadelphia made only 580,000.
Varieties include the scarce 1842-O small date and the 1846 with a 6 punched over a horizontal 6. After gold was found in California, the silver in these coins became worth more than face value. Many were melted or exported. Philadelphia struck only 227,000 in 1850, 200,750 in 1851 and 77,130 in 1852, making the 1852 the scarcest Philadelphia date of the period.
Elsewhere in US coinage in 1851
The three-cent silver piece was introduced in 1851 so people could buy the new three-cent postage stamps. It was the lightest coin the United States has ever issued.
How to recognize it
Liberty sits on a rock holding a shield inscribed LIBERTY and a pole topped with a liberty cap, with 13 stars around her and the date below. The reverse shows an eagle with HALF DOL. below. Arrows beside the date (1853 to 1855 and 1873 to 1874) and rays around the eagle (1853) mark weight changes and IN GOD WE TRUST appears above the eagle from 1866.
Mintage chart
Specifications
| Series | Seated Liberty Half Dollar (1839–1891) |
|---|---|
| Year | 1851 |
| Mint | New Orleans Mint |
| Mint mark | "O" |
| Strike type | Circulation strike |
| Mintage | 402,000 |
| Face value | 50¢ |
| Composition | 90% silver, 10% copper |
| Weight | 13.36 grams |
| Diameter | 30.6 mm |
| Edge | Reeded |
| Silver content | 0.3866 troy oz (12.024 g) |
| Designer | Christian Gobrecht |
Other 1851 Seated Liberty Half Dollar issues
| Coin | Mintage | Type | Silver |
|---|---|---|---|
| 1851 Seated Liberty Half Dollar | 200,750 | Circulation strike | 0.3866 oz |
| 1851-O Seated Liberty Half Dollar | 402,000 | Circulation strike | 0.3866 oz |
Mintage: United States half dollar mintage figures (Wikipedia, CC BY-SA 4.0), compiled from US Mint records and the Guide Book of United States Coins. How we build these pages.