SKH-1c-1967-09 Spiked Head

Description

Recorded as SKH-1c-1967-09, this ninth cataloged spiked head for the 1967 Lincoln cent is cross-referenced to the Cohen Index as 67-54D with a documentation date of January 19, 2018. The nearly two-year span between the earliest April 2016 entries and this January 2018 documentation demonstrates the ongoing nature of spiked head research: the pool of undiscovered varieties in the 1967 cent population is effectively inexhaustible, given that over three billion business strikes were produced and only a tiny fraction have been examined by specialists. The 67-54D designation, as the fourth sub-variant within the fifty-fourth Cohen grouping, adds to an already dense catalog that extends beyond eighty-two primary groupings. For researchers studying die failure patterns, the 1967 spiked head population offers a statistically significant dataset: with dozens of documented spike positions and angles across scores of different dies, patterns emerge about which areas of the Lincoln portrait are most prone to fatigue cracking and at what stage of die life these failures typically manifest. This type of aggregate analysis bridges the gap between individual coin collecting and materials science, treating each documented spiked head as a data point in a larger study of die steel behavior under production conditions. The 1967 cent was the final issue struck without mint marks under the Coinage Act of 1965. Attributed by Cuds on Coins. Struck on a 3.11-gram, 19mm planchet of 95% copper and 5% zinc.

Attribution History

• Discovered by Jim Ussery
• Cross reference: Cohen Index 67-54D. 01/19/2018.
• Expert attribution by Cuds on Coins

External References