1880 Proof Seated Liberty Half Dollar
| Weight | 12.5 grams |
| Diameter | 30.6 mm |
| Mint | Philadelphia |
| Mintage | 1,355 |
| Edge | Reeded |
| Alignment | ↑↓ Coin |
| Composition | 90% Silver, 10% Copper |
| Designer | Christian Gobrecht |
| Collector's Key ID | CK-3960 |
The Mint produced 1,355 proof half dollars in 1880, the highest proof total in the twelve-year low-mintage run and a figure that exceeded the circulation-strike output of 9,755 coins. Thomas Edison demonstrated the incandescent light bulb, and the 1880 census recorded 50 million Americans.
The pattern of proof mintage surpassing circulation output continued for the second consecutive year. The inverted production ratio meant that more proofs than business strikes left the Philadelphia Mint, a situation with no precedent in the half dollar's history. The 1880 proof is obtainable and trades alongside the semi-key circulation strike at comparable pricing. The proof represents the peak of annual proof output during the low-mintage era.
| Grade | Description | Typical Price |
|---|---|---|
| PR-63 | Proof (PR) | — |
This table is for educational purposes only and is intended to illustrate general market price trends and pricing steps between grades. Actual market conditions may vary significantly, especially for rarer pieces that often command premiums above the ranges shown here.
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