The 1919-S Lincoln cent comes from the San Francisco Mint.
It was struck right after the end of World War I.
Like other Lincoln pennies of this era, it was made of a standard bronze alloy.
Millions of these coins entered daily circulation across the country.
Because people spent them freely, most examples quickly wore down.
Early San Francisco cents are famous for weak strikes and poor metal quality.
Finding an early branch-mint penny with its original fiery copper luster is very difficult.
This issue holds the rank 39 spot among the most valuable Lincoln cents.
A top-tier example of this penny crossed the block at Heritage Auctions.
The coin was certified in a remarkable grade of Mint State 66 Red.
Grading services use the "RD" label only for coins that keep nearly all their original red copper color.
A grade of 66 means the coin has only tiny, minor marks visible under close inspection.
Heritage Auctions handled this elite specimen under record 01/25.
Bidders compete aggressively whenever a condition rarity like this appears.
Coins in this preservation tier almost never show up on the open market.
Most surviving 1919-S pennies are brown, worn, or scratched from decades of use.
The main reason for the high value is pure condition rarity.
Copper is a reactive metal that tarnishes easily over time.
When exposed to air and moisture, bright red copper turns brown.
Finding a century-old penny that never turned brown requires incredible luck.
Very few collectors in 1919 saved full rolls of San Francisco pennies.
Those that were saved often developed spots or lost their luster.
Lincoln cent collectors building top-ranked sets need fully red examples for every date.
Because the supply of MS-66 Red pieces is so small, demand always exceeds supply.
The intense competition among serious registry set builders drives prices to record heights.
Start by checking the date on the front right side of the coin.
Look directly below the 1919 date for a small "S" mintmark.
The "S" indicates that the coin was struck at the San Francisco Mint.
If there is no letter below the date, the coin was struck in Philadelphia.
You can use a phone app like Coin Value Checker to get a quick first reading on the date and mintmark.
Grab a 5x or 10x magnifying glass to look closely at the coin's surfaces.
Check Abraham Lincoln's cheek, jaw, and the hair above his ear for signs of wear.
Turn the coin over to check the tips of the two wheat stalks on the back.
If the high points look smooth or flat, the coin has circulated and lost its mint luster.
Look at the color under good natural lighting.
A true Red coin will show bright, reflective orange-copper tones across both sides.
Dark brown or faded red-brown coins carry modest collector value compared to pristine red gems.
Only certified, fully red examples in top mint state grades reach the highest market records.
The easiest way to check worth is a phone scan — see which coin valuation app is worth installing.