IDB-1c-1953-05 Interior Die Break

Description

Fifth cataloged interior die break for the 1953 Lincoln Wheat Cent, IDB-1c-1953-05 records a die failure occurring within the coin's design field rather than at the rim. Interior die breaks are mechanically distinct from cuds: while cuds form when the die rim fractures — the area of highest stress — interior breaks develop in the field or design area away from the rim, where localized stress risers or metallurgical flaws permit crack initiation. The result is a raised irregular mark within the coin's interior, rather than the featureless blob at the rim characteristic of a cud. Cuds on Coins catalogs these under the IDB prefix, differentiating them from CUD, RCD, and LDB varieties. Because die stress concentrates at the rim, interior breaks are statistically rarer than rim failures, making IDB varieties of particular interest to error specialists. The 1953 Philadelphia cent was struck on 95% copper planchets at 19mm, bearing Brenner's portrait and the wheat ear reverse in their forty-fourth year of production. Sequence number 05 marks this as the fifth interior die break reported for the 1953 date.

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