What is a Off-Center Strike?

A Off-Center Strike (OFC) is a coin variety in the "Strike Errors" group. It results from an anomaly during the striking process at the United States Mint. Coins exhibiting this error carry distinct diagnostic markers that distinguish them from normal strikes and are actively collected by error and variety specialists.

How does a Off-Center Strike occur?

A Off-Center Strike occurs due to a malfunction during the actual striking of the coin, such as misalignment of the planchet, multiple impacts, or improper seating in the collar. Once the affected die enters a production run, every coin it strikes carries the same diagnostic markers until the die is retired or replaced.

How do I identify a Off-Center Strike?

Look for design elements that are off-center, partially missing, overlapping from a second strike, or show evidence that the coin was not properly seated during striking. For confirmed Off-Center Strike varieties, cross-reference the coin against the NumisDex catalog entry which lists known die markers and attribution details.

Are Off-Center Strike coins valuable?

Value depends on the specific die variety, the prominence of the error, the coin's grade, and collector demand. Some Off-Center Strike varieties are common and modestly priced, while others — especially early die states or dramatic examples — can command significant premiums. Check recent auction records and price guides for the specific variety.

Where can I find Off-Center Strike varieties in the NumisDex catalog?

You can browse all known Off-Center Strike varieties on NumisDex by visiting the catalog and filtering by the "Off-Center Strike" error type. Each listing includes attribution details, die markers, and images when available.

Off-Center Strike (OFC)

An off-center strike occurs when a coin's planchet is not properly seated between the obverse and reverse dies at the moment of striking. The result is a coin with the design impressed on only a portion of the planchet, leaving the remaining area blank and unstruck. PCGS's guide puts the range at anywhere from 1% to 99% off-center.

How Does It Happen?

In normal minting operations, an automated feed system delivers blank planchets into the collar (the ring that forms the coin's edge) between the obverse and reverse dies. Off-center strikes happen when this positioning goes wrong: NGC describes the error as a planchet that is not held by the collar, so that part of it lies outside the area covered by the dies.

Misfeeds are part of running presses that strike up to about 750 coins per minute. A planchet that is not fully seated, or that sits partly on top of the collar, is struck where it lies.

Once the planchet is off-center, the dies close and strike with full force. The portion of the planchet between the dies receives the design, while the portion outside the die area remains blank. Error-Ref adds that an off-center strike often shows a collar scar, a curved groove on the anvil-die side where the descending hammer die pressed the protruding planchet down onto the top of the collar; many show none.

How to Identify an Off-Center Strike

Off-center strikes are among the easiest errors to identify:

Blank crescent: The most obvious feature is a crescent-shaped blank area on one side of the coin where the planchet extends beyond the die.
Partial design on the struck portion: Unlike a broadstrike, which keeps the whole design on an expanded coin, an off-center strike is missing part of its design. The part that was struck shows normal detail (though it may be slightly weakened at the edges of the struck area).
Irregular shape: The coin is not perfectly round. The blank portion follows the original round planchet shape, but the struck portion may show slight expansion from the striking pressure.
Percentage measurement: Off-center strikes are described by an approximate percentage based on how much blank planchet shows. A "50% off-center" coin has roughly half its surface unstruck.

Measuring Off-Center Percentage

Dealers and grading services describe off-center strikes by percentage, and PCGS's guide says the amount of visible blank planchet is the main factor: a coin with 20% of its planchet showing is called 20% off-center. The figure is an estimate. There is no single published formula, and measuring the shift along the diameter gives a different number from comparing blank area with total area, so two descriptions of the same coin can differ.

Notable Examples

Off-Center with Full Date Visible

Collectors generally look for off-center strikes that still show the full date and mint mark, because the visible date allows attribution to a specific year and mint. On a heavily off-center coin the date is often off the struck area entirely.

Large Denomination Off-Centers

Off-center strikes occur on every denomination, from cents to dollars. Error-Ref illustrates a 1998-P Washington quarter struck off-center with collar scars on its reverse.

Dual-Denomination Off-Centers

Occasionally an off-center strike occurs on a wrong planchet (a planchet intended for a different denomination). These coins combine two errors and need both to be described.

Pre-1965 Silver Off-Centers

Off-center strikes are known on the 90% silver dimes, quarters and halves struck before 1965, as on the clad coins that replaced them.

Collecting Tips

The 40-60% range with full date: PCGS's guide calls 40% to 60% off-center the range most collectors look for, since it shows both design and blank planchet. A full date keeps the coin attributable.
Avoid cleaned examples: Off-center coins are sometimes found in circulated condition. Harsh cleaning damages the surfaces of the struck and blank areas alike.
Check for additional errors: Off-center coins sometimes exhibit other errors too — wrong planchets, clipped planchets, or multiple strikes.
Modern coins are a good start: Off-center Lincoln cents from recent decades turn up often, making them a practical starting point for new error collectors.
Grading service attribution: Major grading services (PCGS, NGC) will note the approximate off-center percentage on the holder label. This gives the coin a consistent description.
Beware of post-strike damage: A coin that was damaged after striking (hammered, bent, or filed) can superficially resemble an off-center strike. Genuine off-center coins show a smooth, original planchet edge on the blank portion.

Off-Center Strike