1970 Doubled Die Obverse WDDO-021

Description

Designated 1970 1¢ WDDO-021, this Philadelphia Mint doubled die obverse holds a cross-reference to the Coppercoins attribution system as 1970P-1DO-002, linking it to a second independently maintained database of Lincoln cent die varieties. The Coppercoins cross-reference is particularly useful because that system employs its own distinct cataloging methodology and die marker photography, giving collectors two independent verification paths for confirming attribution. The "1DO-002" suffix indicates this is the second doubled die obverse Coppercoins identified for the 1970-P date, though numbering order does not necessarily reflect discovery chronology across different organizations. Hub doubling on this variety resulted from the standard mechanism: during die production, the working die received at least two impressions from the hub with measurable misalignment, embedding doubled design features permanently into the die face. The 1970 Philadelphia date carries historical significance in Lincoln cent variety collecting because it produced one of the densest clusters of DDO varieties in the series, driven by the combination of high production volume and the multiple-hubbing die manufacturing process used during this era. Collectors working through rolls or bags of 1970-P cents should note both the Wexler WDDO-021 and Coppercoins 1970P-1DO-002 designations to ensure accurate cross-referencing when buying, selling, or submitting specimens for third-party attribution.

Attribution History

• Discovered by John A. Wexler Cross References: Coppercoins: 1970P-1DO-002
• Coppercoins: 1970P-1DO-002; Wexler Variety ID: 1970 1¢ WDDO-021
• Expert attribution by Wexler Team

External References