A broadstrike occurs when a coin is struck without the retaining collar that normally constrains the planchet to its proper diameter. Without the collar, metal spreads freely under striking pressure, producing a coin that is wider than normal, thinner, and missing its edge detail. Broadstrikes show the full design — unlike off-center strikes, which are missing portions of it.
The collar die is a steel ring that surrounds the planchet during striking, holding it to the correct diameter and impressing edge detail. When the collar fails, the planchet is struck without lateral constraint, spreading outward in all directions.
Broadstrike values depend on the denomination (higher denominations are scarcer), the degree of expansion, condition, and full design visibility. Clean, dramatic broadstrikes with good eye appeal carry the best premiums.
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Scan Your Coin NowA genuine broadstrike shows even, uniform expansion with full design detail and a smooth, flat edge all the way around. Damaged coins show uneven spreading, surface marks, and inconsistent edge character.
Broadstrikes can occur on any denomination. They are most commonly found on pennies and nickels, with broadstrike quarters, dimes, and half dollars being increasingly scarce.
The diameter expansion varies depending on how much the metal spread. Some broadstrikes are only slightly larger than normal, while dramatic examples can be noticeably wider. Measurement with calipers confirms the expansion.
No. A railroad rim (partial collar) error has part of the edge normal and part expanded. A broadstrike has the entire edge expanded because the collar was completely absent.