The 1999-S Pennsylvania Silver Quarter is worth anywhere from $8 in typical proof condition to over $100 for perfect specimens. If you have found one of these shiny, silver-edged coins in a collection or a drawer, you are likely looking at a piece of modern numismatic history that carries a premium over its face value.
Before you dive deep into the specific grades, it is helpful to use a free coin identifier app to confirm that your quarter is indeed the silver proof version rather than the copper-nickel clad version intended for circulation. Using the CoinHix app can also help you quickly distinguish the mint marks and surfaces of your 1999 coins.
Identifying the 1999-S Pennsylvania Silver Proof Quarter
The 1999 Pennsylvania State Quarter was the second design released in the monumental 50 State Quarters Program. While millions of these coins were struck for everyday spending at the Philadelphia and Denver mints, the San Francisco Mint (indicated by the “S” mint mark) produced special specimens for collectors.
It is important to distinguish between the two types of “S” quarters minted that year. One is made of the standard copper-nickel “clad” composition, while the more valuable one is struck in 90% silver and 10% copper. You can usually tell the difference by looking at the edge of the coin; if you see a solid silver stripe with no copper (orange/brown) showing, you likely have the silver version.
To get the most accurate estimate of your coin’s grade, you can check the latest 1999 silver quarter market prices. These silver proofs were only sold in sets, so they should generally be in excellent condition with a mirror-like field and frosted details.
Factors That Influence 1999-S Silver Quarter Value
The primary driver of the value for a 1999-S Pennsylvania Silver Quarter is its “Proof” grade. Since these coins were never meant to be spent in a grocery store, they are expected to be near-perfect. Collectors look for “Deep Cameo” (DCAM) designations, which means there is a sharp contrast between the shiny background and the white, frosted image of the Commonwealth of Pennsylvania outline and the “Virtue, Liberty, Independence” motto.
Tarnish or “toning” can also impact value. Some collectors love a silver coin that has developed colorful rainbow hues over time, while others prefer the stark white brilliance of the original strike. If your coin has scratches or fingerprints, the value will drop toward the lower end of the spectrum.
If you are unsure about the condition of your find, the CoinHix app features high-resolution image recognition to help you spot imperfections that the naked eye might miss. Comparing your coin to a detailed 1999 quarter value guide is the best way to ensure you aren’t leaving money on the table.
1999-S Pennsylvania Silver Quarter Price Chart
The following table provides a breakdown of what you can expect to receive for a 1999-S Pennsylvania Silver Quarter based on its professional grade. Note that prices can fluctuate based on the current market price of silver bullion.
| Coin Condition/Grade | Estimated Market Value |
|---|---|
| PR 65 (Standard Silver Proof) | $8 – $12 |
| PR 68 Deep Cameo | $15 – $22 |
| PR 69 Deep Cameo | $25 – $35 |
| PR 70 Deep Cameo (Perfect Grade) | $100 – $165 |
Why the 1999 Quarters Carry Higher Premiums
1999 was the inaugural year of the State Quarters series, which sparked a massive wave of interest in coin collecting across America. Because it was the first year, many people held onto these coins, but the Silver Proof versions were minted in much lower quantities than the billions of clad quarters released into circulation.
Specifically, the Pennsylvania Silver Proof had a mintage of around 800,000 sets. While that sounds like a lot, it is quite small compared to the 1.2 billion Pennsylvania quarters struck for the general public. This scarcity, combined with the 90% silver content, ensures that these coins will always be worth significantly more than 25 cents.
If you find yourself with a whole bag of 1999 coins, using CoinHix can help you organize your collection and identify which specific state quarters have the highest resale potential. While Pennsylvania is popular, other early states like Delaware and New Jersey also command respectable prices in silver formats.
FAQ
Q: How can I tell if my 1999-S quarter is silver or just a regular proof?
A: The most reliable way is to check the edge of the coin. A silver quarter will have a solid silver/white edge. A regular clad proof will have a visible copper stripe. Additionally, a silver quarter weighs 6.25 grams, while a clad quarter weighs 5.67 grams.
Q: Is a 1999-S Pennsylvania Silver Quarter a good investment?
A: While it is a beautiful coin with silver value, it is considered a “modern” collectible. It maintains its value well due to its silver content and popularity among State Quarter set builders, but it is unlikely to see the massive price spikes associated with rare 19th-century coins.
Q: Where is the best place to sell my silver state quarters?
A: For individual coins, local coin shops or online marketplaces like eBay are common choices. For a large collection, it is best to use a specialized app to inventory your items first so you know exactly what the fair market value is before talking to a dealer.
