The 2000 Sacagawea dollar / Washington quarter mule is one of the rarest and most valuable modern US coin errors. These extraordinary coins were struck using a Washington quarter obverse die paired with a Sacagawea dollar reverse die. Only about a dozen are known to exist, with individual examples selling for $50,000 to over $100,000.
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Scan My CoinA coin struck with a Washington quarter obverse die and a Sacagawea dollar reverse die. The coin is on a dollar-size planchet with a plain edge.
How to check: The obverse shows Washington's portrait from the quarter design, while the reverse shows the Sacagawea dollar eagle design. The coin is dollar-sized with a plain edge instead of reeded.
$50,000 - $100,000+Known mule specimens show variations in edge characteristics depending on which collar die was used during striking.
How to check: Examine the edge carefully. Some examples have a plain smooth edge while others show partial reeding.
Premium based on specific die stateDifferent die states exist among the known specimens, with earlier die states showing sharper detail.
How to check: Compare the sharpness of design details to known die state photographs. Earlier strikes show crisper lettering and design elements.
Earlier die states command premiumKnown examples have sold for $50,000 to over $100,000 at auction. A PCGS MS-67 example sold for $155,250. These are among the most valuable modern US coin errors.
During production at the Philadelphia Mint, a Washington quarter obverse die was accidentally paired with a Sacagawea dollar reverse die. The similar collar sizes made this mix-up possible.
Approximately 12-15 examples are known. They were discovered in 2000 when collector Frank Wallis found the first example in a Sacagawea dollar roll obtained from a bank.
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