The 1929-S Lincoln cent is a classic early penny from the San Francisco Mint.
Workers struck these bronze coins just before the Great Depression changed the American economy.
Like other pennies of the era, the coin features Victor David Brenner's portrait of Abraham Lincoln on the front.
Two stalks of wheat frame the words ONE CENT on the back.
The San Francisco facility placed a tiny "S" mint mark right under the date on the front.
While millions of pennies were made that year, finding an example with its original red copper color is very difficult today.
An extraordinary example of the 1929-S Lincoln cent brought $36,000 at Heritage Auctions.
The coin was certified in Mint State Red condition.
Mint State means the penny never circulated in daily commerce and shows zero trace of wear.
The Red designation means the coin retains nearly all of its original mint luster and fiery copper glow.
Professional grading services only assign this color grade to pieces that kept at least ninety-five percent of their original red surface.
A top-tier sale like this shows the strong premium collectors pay for pristine, fully certified specimens.
Copper is a very chemically reactive metal.
Over time, exposure to air, moisture, and handling causes raw copper to turn brown.
Most 1929-S pennies were spent in everyday trade and quickly faded to dull brown shades.
Others suffered from poor storage in damp paper envelopes or coin albums.
Finding a 1929-S in full-red condition is an extreme rarity because so few survived untouched.
Serious Lincoln cent enthusiasts build sets where every coin must have matching, original red color.
Because the pool of surviving high-grade red coins is so small, competing buyers push prices into thousands of dollars.
Most pennies in old jars or pocket change show heavy wear and carry only modest values.
You can inspect your own penny with a few simple steps at home.
First, use a good light source and look closely at the date on the front right side.
Confirm the year reads 1929.
Check directly below the date for the small "S" mint mark.
If there is no letter beneath the date, the coin came from Philadelphia instead.
If you see a "D", it was made in Denver.
Next, use a 5x or 10x jeweler's loupe to inspect the high points on Lincoln's cheek and coat.
Look to see if the metal is still bright, coppery red rather than chocolate brown.
A phone tool like CoinKnow can help you make a quick first pass if you want a fast read on your coin's details.
Be careful not to confuse a naturally red coin with an old brown penny that someone cleaned or polished with chemicals.
Polished coins have an unnatural, washed-out shine and hold little appeal for serious collectors.
Only authentic, undamaged coins with original mint surfaces qualify for top-tier grades.
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