What is a BIE Die Break Cent?

A BIE Die Break Cent (BIE) is a coin variety in the "Die Damage Family" group. It results from an anomaly during die wear or physical damage 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 BIE Die Break Cent occur?

A BIE Die Break Cent occurs due to physical damage, stress fractures, or progressive wear on the die surface during production runs. 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 BIE Die Break Cent?

Examine the coin for raised lines, lumps, or missing design elements that correspond to damage on the die. These features appear in the same location on every coin struck by that die. For confirmed BIE Die Break Cent varieties, cross-reference the coin against the NumisDex catalog entry which lists known die markers and attribution details.

Are BIE Die Break Cent coins valuable?

Value depends on the specific die variety, the prominence of the error, the coin's grade, and collector demand. Some BIE Die Break Cent 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 BIE Die Break Cent varieties in the NumisDex catalog?

You can browse all known BIE Die Break Cent varieties on NumisDex by visiting the catalog and filtering by the "BIE Die Break Cent" error type. Each listing includes attribution details, die markers, and images when available.

BIE Die Break Cent (BIE)

A BIE error is a specific type of die break found exclusively on Lincoln cents. It consists of a small die break or die chip between the letters B and E in the word LIBERTY on the coin's obverse, creating a raised vertical line that resembles the capital letter I. The resulting visual effect — B, then a raised "I," then E — gives the variety its name. The Lincoln Cent Resource counts more than 1,500 types of BIE, most of them on cents of the 1950s.

How Does It Happen?

The BIE error forms through the same die deterioration process that produces all die breaks and die chips. The specific mechanics are:

A weak spot: On the die, the letters of LIBERTY are sunk into the steel so that they come out raised on the coin. Between the B and the E, only a thin wall of die steel separates the two letter cavities, and that wall is weaker than the surrounding die face.
Die fatigue: Repeated strikes stress the die, and the thin wall between the letters is a likely place for a crack or chip to start.
Chip or crack forms: A small piece of die steel between the B and E breaks away, or a crack develops and a fragment separates. The void left in the die is a narrow, roughly vertical gap.
Metal fills the void: When the next planchet is struck, coin metal flows into the void where the die steel broke away, creating a raised vertical mark on the coin — the "I" of the BIE.

Why B and E in particular? The Lincoln Cent Resource notes that the thin area between those two letters appears to be the part of a Lincoln cent die that breaks most often. Breaks between other letter pairs in LIBERTY do occur, and Cuds on Coins files them under their own names on the same pattern, such as LII, IIB, EIR, RIT and TIY. Some collectors loosely call any of them a BIE, but strictly the name belongs to a break between the B and the E.

How to Identify a BIE

A genuine BIE error has specific characteristics:

Location: The raised mark must be between the B and the E in LIBERTY. Raised marks elsewhere in the legend or design are die breaks or die chips, not BIE errors.
Vertical orientation: The raised mark is approximately vertical, running from the baseline of the letters upward. It does not need to be perfectly straight — many BIE errors are slightly curved, tapered, or irregular.
Height: A strong BIE is roughly the same height as the surrounding letters. Others are shorter than the letters or barely visible.
Raised profile: Like all die break evidence, the BIE is raised above the coin's field. It is a blob or ridge of metal, not an incised mark.
Irregular edges: A BIE is a filled break in the die, not an engraved letter, so its edges are irregular rather than cut to the shape of the lettering.

Strength Classification

Collectors describe BIEs by the strength and clarity of the "I". There is no formal grading scale, but the range runs like this:

Full BIE: The raised mark extends the full height of the surrounding letters and is clearly visible without magnification
Partial BIE: The raised mark is shorter, thinner, or less defined — visible with a loupe but not immediately obvious to the naked eye
Weak BIE: A barely perceptible raised mark that requires careful examination to confirm

Notable Examples

Wheat Cent BIEs (1909-1958)

The Lincoln Cent Resource reports that most known BIEs are on cents dated in the 1950s, the last decade of the Wheat reverse. The Cuds on Coins BIE listing bears this out: nearly every date and mint from 1950 to 1958 appears on it, while its earliest entries are 1930, 1943 and 1944-D.

Memorial and Shield Cents (1959-present)

The reverse design has no bearing on a BIE, which forms on the obverse die, so BIEs occur on Memorial and Shield reverse cents as well. Cuds on Coins lists Memorial-reverse BIEs from 1959-D through 2008 and Shield-reverse examples dated 2012, 2014 and 2017-P.

Collecting Tips

Date set collecting: The most common approach to BIE collecting is building a date set — one BIE example from as many different years as possible. Because BIE errors can appear on any date of Lincoln cent, this is a long-term project.
Cherrypicking opportunity: BIE errors are easy to miss in bulk lots and rolls. Examining 1950s Lincoln cents with a loupe, particularly around LIBERTY, is the usual way to find them.
Die documentation: BIE dies have been catalogued at least since Jean Cohen's 1969 book on Lincoln cent errors and the "BIE Handbook" edited by Howard O. Hardy in 1972, and Cuds on Coins now gives each one a file number. Recording which obverse die a BIE came from is what separates one BIE variety from another.
Condition considerations: For BIE varieties, what matters most is whether the break itself is clear. A strong, full-height BIE stays visible on a worn coin, while a weak one can disappear with only a little wear.
Not just cents: While the BIE designation is specific to Lincoln cents, similar die breaks between letters occur on other denominations. These are classified as die breaks or die chips rather than BIEs, since the BIE name refers specifically to the B-I-E appearance on Lincoln cents.

BIE Die Break Cent