Introduction
Under the State Quarter Program of the U.S. Mint (1999–2008) coin collecting gained new public appeal through designs focusing on state heritage themes. Some error coins from the U.S. State quarters series have become popular collectibles while a few very rare specimens have reached the astonishing value of $150 million. The following section presents a review of extraordinary minting mistakes with explanations for their distinctive appeal.
1. 1999 Delaware “Spitting Horse” Quarter
The 1999 Delaware Quarter, the first of the State Quarters series, depicts Caesar Rodney riding a horse. There was an error during production which resulted in the creation of what collectors call “Spitting Horse” since a die crack created a line running from the horse’s mouth in a way that looked like spit.
Feature | Details |
---|---|
Error | Die crack near the horse’s mouth |
Value | Estimated up to $150 million (high grade) |
Collector Appeal | Unique and recognizable error |
The fascinating error with the State Quarter has turned it into one of the highly sought-after mistakes that collectors go out of their way to get.

2. 2004 Wisconsin’s “Extra Leaf” Quarter
The 2004 Wisconsin Quarter combines three significant state symbols of agriculture: cows with cheese wheels and corn stalks. The corn stalk underwent unintended alteration through a mint error which resulted in two leaf variation versions.
Feature | Details |
---|---|
Error Variants | High extra leaf and low extra leaf |
Value | Significant premiums over face value |
Collector Appeal | Highly desirable due to unique design error |
The two types of the extra leaf error are sought by interested collectors who pay the items higher prices based on their condition and availability.

3. 2005 Kansas “In God We Rust” Quarter
The 2005 Kansas Quarter became famous due to the “In God We Rust” typo which was displayed on its reverse side bearing an image of a bison and state motto.
Feature | Details |
---|---|
Error | Missing “T” in “TRUST” due to a grease-filled die |
Value | Significant premiums for uncirculated examples |
Collector Appeal | Popular for its humorous and ironic error |
Individuals throughout the world of numismatics have universally acknowledged this error due to its unique flaw which renders it the perfect topic of conversation in the realm of coin collecting.

Other State Quarter Mistakes of Note
Multiple other mistakes on State Quarters also have significant appeal for collectors.
State | Error | Estimated Value |
---|---|---|
Connecticut (1999) | Broad strike (expanded coin size) | Over $1,000 |
New Hampshire (2000) | Die crack through the design | Over $500 |
Minnesota (2005) | Extra tree in the design | Over $1,000 |
Georgia (1999) | Missing mint mark | Over $700 |
Finding these errors demonstrates that significant discoveries are present throughout normal currency circulation.
Factors Determining Value
The value of error quarters varies based on several important factors.
- Rarity: The lower the number of coins with the error, the more valuable.
- Condition: Coins in pristine condition are given the highest market value.
- Error Type: Errors that have unique unusual characteristics like additional elements or missing letters are more valuable.
- Collector Demand: The overall demand for both a series of coins and its error type directly affects the market value.
How to Spot Valuable Error Quarters
Following is the procedure to spot valuable State Quarters in your collection as well as change:
- Check the Design: Check the coin for unusual design features along with unnecessary details as well as missing information.
- Pay Attention to Key states: Check Delaware (1999) along with Wisconsin (2004) and Kansas (2005) specifically.
- Apply Good Lighting: Lighting that is sufficient allows individuals to spot minor errors in coins.
- Compare Coins: Compare suspected value errors with well-known documented photographs.
Selling Valuable Quarters
Resume locating a value error coin if suspected:
- Handle Carefully: Expert coin specialists advise keeping the coin unbaited since cleaning procedures are detrimental to its financial value.
- Store Properly: Put coins in insurance holders as a damage preventive act.
- Authenticate: The coin must be professionally graded by PCGS or NGC.
- Consult Dealers: Professional associations such as dealers and auction houses are the best way to ascertain precise valuations and sell coins.
Conclusion
The 1999-P Delaware and 2004 Wisconsin and 2005 Minnesota quarters are three of the most unusual U.S. coins because they fetch almost $150 million as a whole. You will be lucky if you find one of these coins as you may have acquired fantastic value in your possession.
FAQ’s
What is Wisconsin ‘Extra Leaf’ Quarter’s worth?
An extra leaf in cornstarch design is a rare mint error.
What is “Spitting Horse” Error?
A die in the Delaware quarter of 1999 creates a line close to the horse’s mouth.