The 1918 Wheat Penny Value Guide

A flip-over double strike occurs when a coin, after receiving its first normal impression, somehow exits the collar and re-enters the press upside-down — where it receives a second, inverted blow from the opposing die. On a 1918 Lincoln cent, this produces two overlapping Lincoln portraits, one of which appears rotated approximately 180° relative to the other. The error is entirely mechanical, arising from a failure in the feed mechanism or a coin bouncing back into the press during high-speed production.

To identify this error, look for a second ghost image of Lincoln's portrait that is distinctly inverted or rotated relative to the primary image. The lettering will appear in two misaligned layers on both the obverse and reverse. Unlike a simple doubled die (which shows slight splitting at design edges), a flip-over double strike produces dramatically shifted, overlapping impressions visible even to the naked eye. The coin may also lack a normal reeded or smooth collar edge on one section.

Collectors prize this error for its drama and extreme rarity — it represents a catastrophic failure of press mechanics rather than a subtle die anomaly. A 1918-D example graded XF-40 sold at Heritage Auctions in 2008 for $431.25, compared to under $20 for a correctly struck 1918-D in the same grade. Higher-grade examples with strong, well-centered double impressions would command significantly more in today's market.

An off-center strike happens when a planchet enters the coin press misaligned relative to the dies, so the stamping force falls partly on the blank disc and partly off its edge. The resulting coin shows a crescent-shaped area of blank, unstruck metal on one side of the coin, while the opposite side displays a compressed, distorted version of the Lincoln design. The retaining collar that normally keeps a planchet centered is absent or partially bypassed.

The diagnostic feature is a smooth, curved blank area — not a chip or gouge — covering a portion of the coin's face. The percentage off-center is measured by how much of the design is missing. A 10% off-center is barely noticeable; a 50%+ off-center leaves nearly half the coin blank. Critically, the date and mint mark must still be visible for maximum value — a coin missing the date is far less desirable to collectors regardless of the off-center percentage.

Value scales directly with the percentage of misalignment. Minor examples (10–20%) bring $20–$50 in average circulated grades. Dramatic examples at 50%+ with full date visible fetch $100–$300 or more. A documented 1918-S example struck 35% off-center in MS60 sold for over $370 at auction, illustrating the premium that mint-state off-center examples carry over their circulated counterparts.

During the wheat-penny era, mint marks were individually hand-punched onto each working die using a separate steel punch — a process prone to slight misalignment, requiring the punch to be applied more than once. When successive punches land in slightly different positions, the resulting coins show a "ghost" of a secondary letter beside, above, or below the primary mint mark. The 1918 issues have several documented repunched mint mark varieties catalogued in the CONECA (Combined Organizations of Numismatic Error Collectors of America) and Variety Vista references.

Two primary varieties are documented for the 1918-D: RPM-001 (D/D South) shows a secondary D punched below the primary, and RPM-002 (D/D North) shows the secondary D punched above. At least one S/S repunched variety is also documented for the 1918-S issue, with a secondary S visible to the right of the primary. All three require magnification of at least 5–10× to properly diagnose. Under a loupe, the secondary letter appears as a clearly defined ghost impression rather than a surface scratch or damage mark.

These varieties appeal primarily to specialist collectors of Lincoln cent varieties and CONECA variety hunters. Mainstream collector awareness is limited, keeping premiums modest by error-coin standards. Circulated examples bring $15–$35 over normal value; well-preserved uncirculated specimens can command $50–$150 depending on the clarity of the secondary punch and the desirability of the specific RPM number to specialist buyers.

Lamination errors occur when impurities, gas pockets, or subsurface debris in the bronze planchet cause layers of the coin's metal to separate or flake during or after striking. The 1918 cent's 95% copper composition — sourced from smelters under wartime pressure — was more susceptible to impurities than in peacetime production, making lamination errors more prevalent in this era than in later decades. The error can manifest before striking (a pre-strike lamination, which disrupts the design) or after (leaving a void in the coin's surface).

Visually, lamination errors appear as raised flaps, peeling sections, or missing patches of metal on the coin's surface. Unlike post-mint damage such as gouges or scrapes, lamination flaps will have the coin's design partially visible beneath them and will show clean, layered separation rather than torn or roughened metal. Under a loupe, the separation line is smooth and follows the metal's grain rather than a random damage path.

Value depends heavily on the size and position of the lamination and the coin's overall grade. Small, peripheral laminations on heavily worn coins add only modest premiums of $5–$20. Large, dramatic laminations on an uncirculated coin — especially those affecting a significant portion of Lincoln's portrait — are genuinely rare and can bring $100–$300 or more. High-grade examples with a near-complete design beneath an intact flap represent the most desirable specimens to variety collectors.

A die cud forms when a section of a working die chips or breaks away, typically at the die's rim, creating a void in the die face. When the damaged die strikes a planchet, metal flows into this void instead of being shaped by the missing design element, producing a raised, featureless blob — the cud — on the coin's edge or rim. Minor die cracks that do not reach the rim produce simple raised lines across the design; a cud specifically requires the break to connect to the rim, creating an isolated raised mass.

On 1918 wheat pennies, die cuds are the predictable result of overextended die life during wartime production. Denver and San Francisco mint workers routinely used dies well beyond their intended service lives to meet high production quotas. Later die states show progressive cracking, and terminal die states produce coins with dramatic, multi-point cuds. Minor die cracks crossing the face of the coin are more common than full cuds, with the latter being genuinely scarce even within this date's error population.

Minor die cracks on heavily worn 1918 pennies add only modest value — Heritage Auctions sold a lot including a die-cracked 1918 F-12 example for just $69.00 in 2000. However, a large, rim-attached cud on a well-preserved mid-grade coin can bring $100–$200 or more. The most valuable examples combine a dramatic cud affecting a recognizable design element (such as Lincoln's portrait) with a higher numerical grade and original color.