1999-S Pennsylvania Quarter Proof
Proof struck at the San Francisco Mint · 3,713,359 made
- Mintage
- 3,713,359
- Metal
- Copper core clad in 75% copper / 25% nickel
- Weight
- 5.67 g
- Diameter
- 24.26 mm
Original illustration. Tap to flip. Not a photograph of the actual coin.
Face value · Metal value · Small premium · Collector premium · Significant rarity. We use bands because prices change daily.
What is a 1999-S Pennsylvania Quarter Proof worth?
Age alone gives this coin a small premium, even worn. Sharp details and original surfaces push it higher.
What would make yours worth more:
- Grade and, for proofs, strong cameo contrast
- A known variety for the date: 1999-P Delaware "Spitting Horse" Quarter
For market prices, check recent sold results for certified coins in the same grade.
Quick answers
- Is the 1999-S Pennsylvania Quarter Proof rare?
- Not especially. The Mint made 3,713,359 for collectors. Most were kept in their original packaging.
- Is the 1999-S Pennsylvania Quarter Proof silver?
- No. It's copper core clad in 75% copper / 25% nickel. Quarters dated 1964 and earlier are 90% silver.
- Where is the mint mark on a 1999 50 State Quarter?
- On the obverse, to the right of Washington's ponytail (P, D or S). On this coin the mark is S, for San Francisco.
- How many 1999-S Pennsylvania Quarter proofs were made?
- 3,713,359.
What to check on your 1999-S
- Make sure the mint mark really is an S. A worn or filled mark can be misread. It's what separates your coin from the 1999-P (349 million made).
- Look for the 1999-P Delaware "Spitting Horse" Quarter (it's on Philadelphia coins, not this one).
- Judge the grade under good light. State quarters are judged mainly on luster and contact marks. Look for die varieties and errors, which carry the real premiums in this series.
Proofs from 1999 come with and without frosted devices. Coins with strong contrast are labeled Cameo or Deep Cameo and are worth more.
The story of the 1999-S Pennsylvania
Elsewhere in US coinage in 1999
The 50 State Quarters program began, with five new reverse designs each year in the order the states joined the Union.
How to recognize it
The Pennsylvania design
A robed female figure known as Commonwealth stands inside an outline of the state, with a keystone to her side and the motto VIRTUE LIBERTY INDEPENDENCE beside her. The figure is modeled on the statue that tops the dome of the Pennsylvania State Capitol in Harrisburg. The keystone refers to the state's nickname, the Keystone State, a reminder of its central place among the original thirteen colonies. Pennsylvania ratified the Constitution in 1787, the date shown on the coin. This was the second State quarter of 1999.
The 50 State Quarter design
To make room for each state design, the obverse was rearranged: UNITED STATES OF AMERICA, LIBERTY, IN GOD WE TRUST and QUARTER DOLLAR all moved to the side with Washington's portrait. The reverse shows the state's design with its name, the year it joined the Union or ratified the Constitution, the year of issue and E PLURIBUS UNUM. The mint mark is to the right of Washington's ponytail.
Mintage chart
Specifications
| Series | 50 State Quarter (1999–2008) |
|---|---|
| Year | 1999 |
| Mint | San Francisco Mint |
| Mint mark | "S" |
| Strike type | Proof |
| Mintage | 3,713,359 |
| Face value | 25¢ |
| Composition | Copper core clad in 75% copper / 25% nickel |
| Weight | 5.67 grams |
| Diameter | 24.26 mm |
| Edge | Reeded |
| Designer | Obverse by John Flanagan, modified by William Cousins; reverses by various artists |
Other 1999 50 State Quarter issues
Mintage: 50 State quarters (Wikipedia, CC BY-SA 4.0), compiled from US Mint records and the Guide Book of United States Coins. How we build these pages.