Ultimate Guide to 1979 S Washington Quarter Value and Mint Mark Varieties
The 1979-S Washington Quarter is worth anywhere from $3 in typical Proof condition to over $150 for rare high-grade Deep Cameo varieties. While most of these coins were minted for collectors, finding one in your change can be an exciting discovery that piques interest in the hobby of numismatics.
How to Identify the 1979 S Washington Quarter and Its Varieties
If you have stumbled upon a 1979 quarter with a small “S” mint mark, you have found a coin produced at the San Francisco Mint. Unlike the standard quarters minted in Philadelphia or Denver for general circulation, the “S” quarters of 1979 were specifically struck as “Proof” coins. These were intended for collectors and featured a mirror-like finish and sharp details.
Identifying your coin exactly is the first step to knowing if you have found a hidden gem. To make this process easier, you can use a free coin identifier app to snap a photo and confirm the variety. In 1979, the San Francisco Mint used two different mint mark punches, known as Type 1 and Type 2.
The Type 1 “Filled S” is the most common variety, where the mint mark looks somewhat blob-like and indistinguishable. The Type 2 “Clear S” is much rarer and more desirable, featuring a crisp, well-defined letter S. If you are unsure which one you have, the CoinKnow app can help you distinguish between these subtle mint mark differences by comparing your coin to high-resolution database images.
The Market Value of 1979 S Washington Quarters
The value of your 1979-S quarter depends heavily on which Type it is and the condition of its surfaces. Because these coins were sold in protective plastic sets, many have survived in excellent condition. However, coins that were removed from sets and spent time in circulation will only be worth their silver-less “clad” face value or a small premium to a casual collector.
For those looking for specific market data, checking the current 1979 Washington quarter price guide is essential. Generally, the Type 2 Clear S carries a significantly higher premium than the Type 1. While a Type 1 might fetch $3 to $5, a perfect Type 2 can reach much higher figures at auction.
Many collectors use the CoinKnow mobile tool to track these price fluctuations in real-time. It is important to remember that these quarters are “Clad,” meaning they are made of copper and nickel, not silver. Their value comes purely from their numismatic rarity and the “Cameo” effect, where the portrait of Washington looks frosted against a shiny background.
| Condition/Variety | Estimated Market Value |
|---|---|
| 1979-S Type 1 (Filled S) Proof-65 | $3.00 – $5.00 |
| 1979-S Type 1 (Filled S) Proof-69 Deep Cameo | $15.00 – $25.00 |
| 1979-S Type 2 (Clear S) Proof-65 | $10.00 – $20.00 |
| 1979-S Type 2 (Clear S) Proof-70 Deep Cameo | $125.00 – $180.00 |
Determining the Grade and Rare Features
Professional grading is what truly separates a $5 coin from a $150 coin. The highest grade possible is Proof-70, which signifies a perfect coin under 5x magnification. Most 1979-S quarters reside in the Proof-67 to Proof-69 range. If you notice any scratches, fingerprints, or “milk spots” on the surface, the value will decrease significantly.
When researching the 1979-S Washington Quarter auction records, you will see that “Deep Cameo” (DCAM) designations are the gold standard. This means there is a heavy contrast between the mirrored fields and the white, frosted devices of the design.
If you think you have a Type 2 Clear S in perfect condition, it might be worth sending to a professional grading service like PCGS or NGC. Before spending money on grading fees, use CoinKnow to get an initial estimate of your coin’s potential grade and see if the investment is worth it.
Frequently Asked Questions about the 1979 S Quarter
Q: Is the 1979-S Washington Quarter made of silver?
A: No, all standard 1979 quarters, including the “S” proofs, are made of a copper-nickel clad composition. The US Mint did not produce silver quarters for circulation or standard proof sets in 1979.
Q: How can I tell the difference between Type 1 and Type 2?
A: Look closely at the “S” mint mark with a magnifying glass. The Type 1 “Filled S” has rounded ends that appear to touch the middle of the letter, making it look like a blob. The Type 2 “Clear S” has flat, distinct ends and the loops of the S are clearly separated from the center.
Q: Why did I find a Proof coin in my pocket change?
A: Occasionally, people break open proof sets meant for collectors and spend the coins as regular money. Once a proof coin enters circulation, it loses its mirror-like finish and its value drops closer to face value, though it remains a fun find for many.
