Cud

Cud

A cud is a raised, rounded blob of metal on a struck coin, formed when a fragment breaks away from the edge of a die and the coin's metal flows into the resulting void. It is the end stage of die deterioration, following on from die cracks, and is one of the most unmistakable mint errors. Cuds are sometimes described as die breaks, with the term cud traditionally reserved for a break that reaches the rim of the die.

Explanation

As a cracked die continues in service, the crack can widen until a piece of the die face - almost always at the rim, where the steel is most stressed - breaks away entirely. The missing chunk leaves a cavity in the die. When the next planchet is struck, metal is forced into that cavity exactly as it is forced into the design, producing a raised, bulbous lump on the coin at the position of the missing die fragment. Because the broken piece often remains partially attached and shifts between strikes, early cuds may appear irregular or intermittently present, hardening into a consistent shape as the die settles into its damaged state.

Identification

The classic cud appears as a smooth, raised blob connected to the rim, often partially obliterating adjacent letters or design elements. Unlike an incuse dent or added material, the cud is solid struck metal continuous with the coin's surface, and it will show the same wear and lustre as the surrounding fields. Repetition across multiple coins from the same die confirms the diagnosis. A "retained cud" - where the broken die fragment stays loosely in place - produces a raised area bordered by a crack line, an intermediate form prized by error specialists.

Example

An Australian example might be a five-cent coin on which a cud obliterates part of the legend ELIZABETH II at the rim, or a ten-cent piece carrying a large blob at eleven o'clock swallowing the first letters of AUSTRALIA. Major cuds on the portrait side are generally more sought after than equivalent reverse cuds.

Important Considerations

• Size: Value rises sharply with the size of the cud; a cud spanning a third of the rim is a major error.
• Rim connection: A true cud touches the rim; a raised lump wholly within the design is more likely a die chip or lump and is described differently.
• Authentication: Genuine cuds are integral struck metal. Any blob that appears soldered, glued or cast on - or which breaks the coin's own surface patina - is alteration, not error.

In summary, a cud is the coin's record of a piece of its die having broken away, and the solid, rim-connected blob it leaves behind is both a dramatic sight in change and one of the most easily authenticated errors in numismatics.