1964 Proof Doubled Die Obverse WDDO-020

Description

Carrying the twentieth Wexler doubled die obverse designation in the Proof-prefixed title series for the 1964 Lincoln cent, this variety reflects the remarkable depth of proof DDO discoveries for the date. The 1964 proof cent mintage of 3,950,762 pieces was produced on dies with a service life of approximately 3,000 strikes, requiring well over a thousand proof die pairs to fill the year's demand. Each die pair represents a unique combination of obverse and reverse dies, each manufactured through the multi-impression hubbing process that could produce a doubled die at every step. The sheer number of die pairs needed meant that the probability of some receiving misaligned hub impressions was statistically significant, and decades of variety research have steadily expanded the catalog. No specific doubling description, die markers, cross-references, or expert attributions have been published for this variety. Collectors evaluating potential specimens should photograph the coin at multiple magnifications and compare the results against reference images, as the reflective proof surface can create optical artifacts at certain angles that might be mistaken for doubling. Genuine hub doubling is consistent and repeatable — it appears identically on every coin struck from the same die — while optical effects from the proof mirror vary with lighting and viewing conditions. This distinction is the fundamental test separating true doubled dies from false positives. Struck on a polished 3.11-gram, 19mm bronze planchet of 95% copper and 5% tin-zinc.

Attribution History

• Discovered by Wexler Team

External References