What Is Your 2006 Quarter Worth?

The Five-Legged Buffalo is a die chip variety produced when a small fragment broke from the working reverse die used at the Denver Mint in 2006. Metal from subsequent strikes flowed into the void left by the chip, creating a raised, metal nub on coins struck from that die state.

To identify it, examine the area beneath the lead bison's belly on the reverse, between its front and rear legs. The raised lump — resembling a stubby fifth leg — is clearly above the coin's surface and visible once you know its location. A 10× loupe makes confirmation easy; it should not be confused with a post-mint scratch or gouge, which would be incused.

Collectors prize this variety for its visual humor and for being the most accessible 2006 error to hunt. Raw, ungraded examples sell for $20–$50, while certified MS-65 or higher specimens regularly bring $75–$150 or more depending on the quality of the surrounding surfaces.

A Doubled Die Obverse (DDO) occurs when the working die receives more than one impression from the hub during the hubbing process, with slight rotational or translational misalignment between impressions. On 2006-P North Dakota quarters, this resulted in clear doubling visible in the inscriptions on the obverse face.

Collectors can identify this variety by examining "IN GOD WE TRUST" and "LIBERTY" with a 10× loupe. The letters appear to have a distinct secondary image shifted slightly from the primary — not to be confused with machine doubling, which is flat and shelf-like. True hub doubling shows rounded, separate letter images. Some Philadelphia-minted Nebraska, North Dakota, and South Dakota coins also exhibit a minor "Doubled Ear" variety showing a secondary earlobe on Washington's portrait.

A 2006-P North Dakota DDO graded MS-65 sold for $1,005 at a GreatCollections auction in 2023, making this the most monetarily significant variety (excluding wrong planchet errors) for 2006. Minor Doubled Ear coins sell for $5–$25 raw. The full DDO commands strong premiums even in circulated grades because die doubling survives wear.

Missing clad layer errors occur when a planchet blank is missing one of its outer copper-nickel layers before being struck. The copper-nickel clad process bonds three layers together — outer nickel-copper alloy on both sides surrounding a pure copper core. If a planchet exits the strip without one outer layer bonded, the resulting coin shows a bright copper color on one face while the other looks normal.

These errors appear across multiple 2006 state designs, with Colorado and Nevada confirmed examples. The most dramatic specimens show the full copper face with no nickel coverage; partial missing clad errors expose irregular copper patches. Check the coin's edge — a correctly struck 2006 quarter shows a visible orange copper stripe between the two silver-toned nickel layers; a full missing clad coin has no such stripe on one side.

A 2006-D Colorado partial missing clad error graded MS-64 sold for $870 at Heritage Auctions in 2023. A 2006-P Nevada missing clad layer example was sold through GreatCollections, confirming this error spans multiple designs. In lower grades or partial examples, values run $50–$200; significant, fully copper-faced examples command $300 or more when certified.

An off-center strike occurs when the planchet is not correctly positioned within the collar die during striking. The two working dies — obverse and upper — come together but stamp only a portion of the coin's surface, leaving a blank, unstruck crescent on the opposite side. The degree of misalignment, expressed as a percentage, directly determines the coin's value.

On 2006 off-center quarters, the key diagnostic is that the design misalignment must be identical on both faces — if only one side appears shifted, the coin is more likely a misaligned die error (worth far less). A 10% to 20% off-center coin still shows the date and mint mark; collectors strongly prefer specimens where these elements are readable. A Nebraska example with approximately 40% off-center strike graded MS-62 reportedly sold for $920 in 2023, while typical 10–15% examples bring $20–$50.

The more dramatic the misalignment, the rarer and more collectible the coin becomes. Specimens showing 50% or greater off-center are extremely uncommon in this series due to modern quality control at the Mint. Nebraska and South Dakota designs appear most frequently in documented off-center listings, though this error can theoretically affect any 2006 design.

Wrong planchet and foreign object errors represent the most dramatic — and most valuable — production mistakes in the 2006 series. They occur when an alien blank enters the coin press instead of the intended quarter planchet. The dies strike whatever lands in the chamber, producing a coin with quarter design but incorrect size, weight, and/or composition.

The most extraordinary documented example is a 2006-P North Dakota quarter struck on a steel washer, which sold for over $8,600 — the highest recorded sale for any 2006 quarter of any type. The washer's irregular shape and ferrous composition make this an unmistakable and unique error. More common wrong planchet errors include quarters struck on nickel (five-cent) planchets, which are slightly smaller and weigh 5.00g rather than the correct 5.67g. These sell for $40–$80 in typical grades.

Authentication by PCGS or NGC is essential before buying or selling any wrong planchet or foreign object error. The encapsulation slab documents the error type and protects a coin that could otherwise be dismissed as damage. Die cud errors — major rim breaks on the die that create raised blank "cuds" on coins — are also documented for 2006 Colorado and represent a more accessible entry point at $40–$150.