2019 Variety WMDO-001

Description

Classified at the master die level rather than the working die level, WMDO-001 for the 2019 Lincoln Shield cent documents significant extra thickness on the numeral 9 in the date — a doubling event that occurred during the production of the master die itself, meaning every working die derived from this master inherits the same doubling characteristic. The Wexler Team cataloged this as Wexler Variety ID: 2019 1¢ WMDO-001, noting that die markers will vary among individual working dies — the hallmark statement for master die and hub-level varieties, where the doubling is consistent across all derived dies but each working die carries its own unique scratches, gouges, and wear patterns. Lyndall Bass's Shield reverse design, introduced in 2010 to replace Frank Gasparro's Lincoln Memorial reverse, pairs with Victor David Brenner's classic Lincoln obverse portrait that has served the cent denomination since 1909. Master die doubling (MDO) occupies the highest level in the die production hierarchy — above working hub doubling (WHO) and working die doubling (DDO) — meaning WMDO-001's extra thickness on the 9 should theoretically appear on a larger population of coins than a single-die variety. Significant extra thickness on a single date numeral represents a focused anomaly where the master die received its secondary impression with displacement concentrated in the area of the 9, leaving other obverse elements unaffected. Philadelphia's annual cent production in 2019 reached approximately 3.54 billion pieces, an output that generated thousands of working dies all potentially carrying this master die characteristic. Collectors examining 2019 cents should compare the stroke weight of the numeral 9 against the other date digits as the primary diagnostic approach.

Attribution History

• Discovered by Various individuals Cross References: None known
• None known; Wexler Variety ID: 2019 1¢ WMDO-001
• Expert attribution by Wexler Team

External References