In numismatics, different types of coins attract attention because of their historical significance, rarity, and consequent high prices. San Francisco Mint quarters marked with the S
mint mark have been under the spotlight.
This article will consider the rare ‘S’ mint quarters, analyzing their factors affecting value, showcase appropriate specimens that yield premium prices, and finally provide the reader with an evaluation and identification guide for such quarters.
A Primer on ‘S’ Mint Quarters
An S
mint mark signifies that the coin was minted at the San Francisco Mint. In other words, the minting, established in 1937, produced proof coins and recently uncirculated business strike coins.
Although many S
quarters are mintage in large numbers, some years and varieties are extremely rare because of low mintage numbers, special errors, or heavy demand from collectors.

Factors Affecting Their Pricing
Many factors render certain S
mint quarters over-premium:
- Low Mintage Numbers: Quarters minted in limited numbers become rarer and more valuable.
- Minting Errors: A mint error such as doubled dies or misstrikes makes the coin that much more appealing.
- High-Grade Condition: Higher the grades value go higher. For instance, MS67 and higher demand premium pricing.
- Historical Importance: Quarters that commemorate major events or anniversaries tend to receive higher values for that reason.
Top ‘S’ Mint Quarters That Command Premium Prices
Some ‘S’ mint quarters that have been sold for premium prices at auctions include the following:
1.1932-S Washington Quarter
This quarter, minted in 1932, is known for its low mintage of 408,000 coins. A value of $74,400 has been placed on it for the MS66 grade.
2.1943-S Washington Quarter
This quarter became known for its doubled die errors. Coins with such errors command premium prices in collectible consideration.
3.1965 Special Mint Set (SMS) Quarter
This quarter was struck at the San Francisco Mint as part of a special mint set; it is rare, due in part to its unusual finish and low mintage.
4.1981-S Proof Deep Cameo Washington Quarter
The deep cameo contrast, low mintage, and sale for $2,530 in PR70 DCAM condition make this proof very desirable.
5.2010 Hot Springs Arkansas NP Washington Quarter
An America the Beautiful quarter minted at the San Francisco Mint, notable for low mintage and a unique design.

Identifying and Valuing Your ‘S’ Mint Quarters
To find out if you may have a valuable ‘S’-minted quarter:
- Examine the Mintmark: Look for the ‘S’ mintmark located just under the date on the obverse.
- Examine Condition: Coins may be graded Poor (P-1) to Perfect Uncirculated (MS70). Higher grade coins are considered more valuable.
- Examine Possible Errors: Search for minting errors such as doubled dies or off-center strikes or noting any other significant peculiarities that may elevate value.
- Seek an Expert: For accurate assessment, professionals such as numismatists may be consulted, or else one may send the coin for appraisal to any legitimate grading service.
- While many ‘S’ mint quarters are considered common and circulate at face value, rare years and varieties may deserve premium prices from collectors.
Familiarizing oneself with the various factors affecting coin value- that being, the mintage number, minting errors, and actual condition-will serve very well in spotting those rare specimens.
Once you think you may have a rare ‘S’ mint quarter, it is best to get a professional value appraisal done, so that you may know its true market value.
FAQS:
What is the significance of an ‘S’ mint mark on a quarter?
The quarter with the ‘S’ mint mark was minted at San Francisco Mint.
Why are some ‘S’ quarters more valuable than others?
Its value is greatly conditioned by the factors such as being very low minted, minting errors, high grades, and their historical importance.
How do I find the value of my ‘S’ mint quarter?
Determine the coin’s condition, look for minting errors, and seek the advice of a qualified numismatist or reputable grading agency for a more accurate valuation.