CU-1C-1979-02 Cud

Description

Second in the sequence of documented rim breaks for the 1979 Philadelphia cent, CU-1C-1979-02 was cataloged by Cuds on Coins and extends the cud census for this final year of unmintmarked Philadelphia cent production. The existence of multiple cuds for the 1979-P date confirms that Philadelphia's die consumption rate during this year was sufficient to generate a statistically meaningful number of terminal rim failures — each corresponding to a separate working die that accumulated enough fatigue damage to fracture at its periphery. The mechanical environment within the Philadelphia Mint during 1979 was unchanged from prior years: high-speed presses operating at production speeds delivered the hundreds of thousands of strikes per die that gradually degraded the tool steel through cyclic stress accumulation. CU-1C-1979-02 is distinguished from CU-1C-1979-01 and subsequent entries by the specific angular position of its rim break relative to the coin's design — a parameter that serves as the primary identification criterion when comparing specimens against reference documentation. The cud itself manifests as a raised, featureless mass of copper at the break location, with its size and shape determined by the geometry of the separated die fragment and the extent of any subsequent die degradation at the break margins. All 1979 Philadelphia cents were struck from 95% copper planchets without a mint mark. Attribution by Cuds on Coins.

Attribution History

• Discovered by Keynumis on ebay
• CU-1C-1979-02
• Expert attribution by Cuds on Coins

External References