Every few months, another story breaks about a coin worth more than a house — and the 1943 copper penny is usually the headline. It's not hype: genuine examples have sold for over a million dollars at auction, verified by major auction houses and reported by mainstream news outlets, not just coin-world forums. Here's what that coin and a handful of other genuinely valuable error and key-date coins are actually worth, based on real, documented sales rather than inflated clickbait numbers.

1943 Copper Penny: the most famous error coin in U.S. history

In 1943, the U.S. Mint switched penny production to zinc-coated steel to conserve copper for the war effort. A small number of leftover bronze planchets from 1942 got fed into the presses anyway, producing a handful of 1943 pennies struck in the wrong metal. Only a few dozen genuine examples are confirmed across all three mints combined, with just one verified from Denver.

Direct answer: A 1943-D bronze cent — the only confirmed Denver example — sold for $1.7 million in 2010. A Philadelphia-struck example, found in a teenager's school cafeteria change in 1947 and kept for 72 years, sold for $204,000 at a 2019 Heritage Auctions sale. As of early 2026, numismatic trade publication CoinWeek estimated that if the 1943-D example reappeared on the market today, it could realistically command $2 million or more, reflecting how much demand for the coin has grown even since 2010.

If you think you've found one: a genuine 1943 bronze cent will not stick to a magnet (steel cents will), and should weigh about 3.11 grams rather than the steel cent's 2.7 grams. Given the value involved, authentication through PCGS or NGC is essential before assuming anything — copper-plated steel fakes are common specifically because this coin is so well known.

1955 Doubled Die Obverse Cent

A die-alignment error during production caused the date and lettering on the obverse to appear doubled, clearly visible even without magnification — which is exactly why this error got noticed and spent into circulation before anyone caught it at the Mint. Unlike the 1943 copper penny, enough examples exist (estimated at 20,000–24,000) that this is a genuinely findable coin, not a once-in-a-lifetime discovery.

Circulated examples with visible wear typically sell in the $1,000–$3,000 range. Uncirculated examples climb quickly from there — into the tens of thousands for choice Mint State grades, and top-certified specimens have sold at auction for over $100,000, including a PCGS MS65+RD example that brought $114,000 at a 2018 Stack's Bowers sale. Full details and the complete certified population are tracked on PCGS CoinFacts.

1976 Bicentennial Quarter

Struck in 1975 and 1976 (all dated 1776–1976, with no quarters dated 1975) to mark America's 200th anniversary, the Bicentennial quarter featured a colonial drummer design on the reverse. The vast majority are common and worth close to face value — but two details change that:

  • Silver vs. clad: Collector-only 1976-S coins were struck in 40% silver, alongside the standard copper-nickel clad business strikes. A silver 1976-S quarter carries a modest premium even in circulated grades, and considerably more in high Mint State or Proof condition.
  • Grade and doubled dies: A 1976-D Doubled Die Obverse variety exists, and top-certified examples of the silver 1976-S in near-perfect grades (MS69/PR69) have sold for well over $10,000 — one PCGS MS69 example reportedly brought $19,200 at a 2019 Heritage sale.

For the ordinary clad version sitting in a drawer, don't expect more than a small premium over face value unless it's in exceptional uncirculated condition.

1964 Kennedy Half Dollar

Rushed into production within weeks of President Kennedy's assassination, the 1964 half dollar was struck in 90% silver — the last year the denomination used that composition before switching to 40% silver (1965–1970) and eventually copper-nickel clad. Its value today breaks down into two layers:

Melt value is the baseline: each 1964 half dollar contains 0.3617 troy oz of pure silver, worth roughly $23–$25 at recent spot prices — meaning even a heavily worn example is worth many times its 50-cent face value for the silver alone. Numismatic value takes over for specific varieties: the 1964 Accented Hair proof variety (a subtle design change made early in production) can bring $5,000–$20,000+, and the extremely rare 1964 Special Mint Set (SMS) striking — fewer than a dozen known — holds the record for the series at $156,000.

Bonus: two more worth knowing

1909-S VDB Lincoln Cent. The classic key date of the entire Lincoln cent series — a low San Francisco mintage combined with designer Victor David Brenner's initials (VDB), removed from the design almost immediately after release. We cover this coin and the broader framework for spotting key dates in what a mint mark is and why it changes value.

2004-D Wisconsin "Extra Leaf" Quarter. A die-gouge error on the Wisconsin state quarter's corn-ear design added what looks like an extra leaf, in two varieties (high leaf and low leaf). A genuinely modern error — proof that valuable mistakes didn't stop happening after 1955 — these have sold for several hundred to over a thousand dollars in top grades.

How to tell if you actually have one

Every coin on this list is defined by a specific, checkable detail — a date, a doubled letter, a metal composition, a mint mark — not just "it looks old." Our full guide on how to tell if an old coin is valuable covers the mintage, condition, and demand factors behind every coin on this page, and how coin grading works explains why the exact same date can be worth $50 or $50,000 depending on condition alone.

The fastest way to check what you're holding is still a photo. Coin Gauge identifies the date, mint, and estimated condition from a photo in under three seconds, covering U.S. and world coins from more than 180 countries — enough to tell you whether something in your change is worth a second look, or a trip to a professional grading service before you do anything else with it.

FAQ

How much is a 1943 copper penny worth?

Genuine examples have sold for $204,000 to $1.7 million at auction, depending on mint mark and condition, with a 2026 estimate from CoinWeek suggesting the rarest example could now command $2 million or more if resold.

How can I tell if my 1943 penny is copper or steel?

A genuine copper 1943 cent will not stick to a magnet and weighs about 3.11 grams, versus 2.7 grams for the common steel version. Given how valuable and frequently counterfeited this coin is, professional authentication through PCGS or NGC is strongly recommended before assuming you have a genuine example.

Is every 1955 doubled die penny worth thousands?

Most genuine examples are worth at least $1,000 even in worn condition, with uncirculated examples worth significantly more. Values depend heavily on grade, so professional grading matters for anything beyond a rough estimate.

Are all 1976 Bicentennial quarters valuable?

No — most clad Bicentennial quarters are worth close to face value. The 40% silver 1976-S version and high Mint State or Proof grades are where real premiums appear.

Is a 1964 Kennedy half dollar worth more than 50 cents?

Yes, essentially always — its 90% silver content alone is worth around $23–$25 at recent silver prices, well above face value, before any collector premium for specific varieties.

Think you might have one of these in a jar or inherited collection? Check it free with Coin Gauge before you do anything else with it. Scan it now →