The 1931-S Lincoln cent comes from the San Francisco Mint during the Great Depression.
Economic hard times slowed down commerce across the United States.
Because fewer people were spending money, banks did not need many new pennies.
The mint only produced 866,000 Lincoln cents in San Francisco that year.
That tiny production run makes the 1931-S one of the famous semi-key dates in the entire Lincoln penny series.
Collectors immediately noticed the low output and began pulling fresh pieces from circulation.
Finding one today with its original bright copper color is still very difficult.
Top-quality examples of this date can bring remarkable sums on the auction block.
A stunning specimen graded MS Red sold through Heritage Auctions for $38,400.
The MS stands for Mint State, which means the coin never saw daily circulation and shows no trace of wear.
The Red designation means the copper retains almost all of its original fiery mint luster from 1931.
Most surviving 1931-S pennies faded to brown or reddish-brown over the decades.
A certified Mint State Red piece commands top dollar because serious registry set builders compete fiercely for the brightest coins.
You should keep in mind that ordinary, circulated examples do not sell anywhere near this record price.
The main factor behind the strong market value is the remarkably low mintage.
With only 866,000 struck, it ranks as the second-lowest regular issue mintage in the entire series behind only the 1909-S VDB.
Even though many people saved these coins early on, finding full-red examples remains an uphill battle.
Copper is a chemically active metal that darkens easily when exposed to air, moisture, or old paper holders.
Over ninety years of storage turned most survivors a deep chocolate brown.
The Lincoln cent remains one of the most widely collected coin series in American numismatics.
Every collector trying to finish a complete date-and-mint set needs a 1931-S penny.
That steady demand from thousands of hobbyists keeps prices strong across every grade level.
You can check your coin at home using a standard 5x or 10x magnifying glass under good lighting.
First, look at the date on the front of the coin to the right of Abraham Lincoln's portrait.
Make sure all four digits clearly read 1931.
Next, look directly below the date for the tiny "S" mint mark.
If there is no letter below the date, the penny was struck in Philadelphia, which is far more common.
Be careful when examining the mint mark, as counterfeiters sometimes glue a fake "S" onto a common Philadelphia cent.
Take a close look at the color of the copper surfaces under bright, natural light.
A coin with original red color looks like a shiny new copper pipe, while a brown coin looks like an old rusty penny.
If you want a fast way to check your find, phone tools like CoinKnow or Coin Value Checker can help you identify what you have before you consult a dealer.
Always hold your coin only by the edges to protect the fragile copper surfaces from the oils on your fingers.
If charts make your eyes glaze over, a closer look at which free coin identifier apps actually works is friendlier.
Upload a photo and get an instant value, grade estimate, and error check — no jargon, no sign-up required.