The 1979 penny might look like ordinary pocket change, but certain rare errors can make it worth hundreds or even thousands of dollars.
Accurate identification is crucial for coin collectors who want to distinguish valuable varieties from common circulation coins.
Many beginners mistake post-mint damage for genuine mint errors, potentially missing real treasures or overpaying for worthless pieces.
Coin value apps like CoinKnow can help you identify these errors instantly, provide professional grading, and determine accurate market values.
In this guide, we’ll explore the documented 1979 penny errors that serious collectors actively seek.
Rare 1979 Penny Error List & Value
1. 1979-S Penny Type 2 Clear S Error
The most significant 1979 penny variety involves the proof coins struck at San Francisco.
The Type 1 features a “Filled S” mintmark where the serifs connect to the diagonal stroke, creating a blob-like appearance.
The Type 2 displays a “Clear S” where the serifs remain separated from the diagonal, showing distinct open spaces within the letter.
Type 2 proofs in PR69 DCAM condition typically sell for $30 to $75, while perfect PR70 examples can reach $1,350 or more.
To identify this variety, examine the mintmark under magnification and look for the clear separation in the S’s curves.
Can’t tell Type 1 from Type 2? This subtle distinction stumps even experienced collectors. Check out the review of the 10 best coin value apps free that can instantly identify mintmark varieties and provide real-time market values for your 1979 proofs.
2. 1979-D Penny Repunched Mintmark Error
Repunched mintmark errors occurred when mint workers punched the “D” mintmark multiple times in slightly different positions.
The 1979-D RPM-001 variety is cataloged by CONECA and shows evidence of the mintmark being struck more than once.
These errors typically display a shadow or ghost image near the primary mintmark when viewed under magnification.
Values for confirmed 1979-D repunched mintmark pennies range from $3 to $25 depending on the strength and visibility of the doubling.
Look carefully below the date for any signs of secondary mintmark impressions or unusual thickness around the D.
Struggling to spot this subtle variety? A reliable coin value app like CoinKnow uses advanced AI to detect repunched mintmarks that human eyes might miss.
3. 1979 Penny BIE Die Crack Error
The BIE variety is a unique die crack error exclusive to Lincoln pennies that creates a distinctive appearance.
This error shows a thin vertical raised line between the letters “B” and “E” in the word “LIBERTY.”
The raised line roughly resembles a capital letter “I,” which gives this popular variety its memorable BIE nickname.
Values for 1979 BIE pennies typically range from $5 to $25 depending on the prominence and clarity of the die crack.
Examine the LIBERTY inscription carefully under good lighting to spot this interesting die deterioration variety.
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4. 1979 Penny Wrong Planchet Error
Wrong planchet errors are among the most valuable mint mistakes, occurring when pennies are struck on blanks meant for other denominations.
A 1979 penny struck on a dime planchet weighs only 2.27 grams instead of the standard 3.11 grams.
These cross-denomination errors also measure 17.9 millimeters versus the normal 19.05 millimeters for a cent.
Authenticated examples of 1979 pennies on dime planchets have sold for $3,000 to $7,000 at major auctions.
Always weigh suspicious coins and measure their diameter to detect potential wrong planchet errors.
This rare error requires professional authentication. Use a trusted coin value app like CoinKnow to get expert analysis before investing in expensive pieces.
5. 1979 Penny Broadstrike Error
Broadstrike errors happen when the retaining collar fails during the striking process, allowing the planchet to spread beyond normal boundaries.
These coins appear larger than standard pennies and display weak or missing rim definition around the edges.
Genuine 1979 broadstrike pennies typically measure 21 to 23 millimeters compared to the standard 19 millimeters.
Values for broadstrike errors range from $40 to $80 depending on how dramatic the spreading appears.
Compare your coin against a normal penny to check for size differences and rim irregularities.
Not sure if your oversized penny is genuine? CoinKnow’s coin value app can distinguish authentic broadstrikes from damaged coins instantly.
6. 1979 Penny Clipped Planchet Error
Clipped planchet errors occur during blank production when the punching process overlaps previously cut holes in the metal strip.
These coins display curved or straight clips along their edges where metal is missing from the planchet.
Small clips affecting 5% to 10% of the planchet edge are most common and bring modest premiums.
Values for 1979 clipped planchet pennies typically range from $20 to $40 depending on clip size and location.
Look for natural curved cuts along the rim that show the clip occurred before striking, not after.
Wondering if your clipped penny is mint-made or damaged? CoinKnow’s coin value app helps distinguish genuine errors from post-mint alterations.
How Much is 1979 Penny Worth? Coin Identifier I Recommended
Finding accurate values for your 1979 penny errors requires reliable identification tools designed for collectors.
CoinKnow stands out as the premier coin value app for error identification. It offers AI-powered instant recognition, professional Sheldon Scale grading within a 2-point accuracy range, and automatic rare error detection including doubled dies and repunched mintmarks. The app provides real-time market valuations and comprehensive collection management tools.
CoinValueChecker serves collectors who want identification combined with market intelligence. This app features automatic error detection, trend analysis, auction alerts, and price tracking capabilities. It excels at providing trading insights and long-term portfolio monitoring for serious numismatists.
Both apps help you identify 1979 penny errors quickly and determine whether your coins deserve professional certification.
