The 1938-S Lincoln cent is a classic copper penny struck in California.
The San Francisco Mint made these pennies toward the end of the Great Depression.
Most Lincoln cents from this era went straight into circulation.
People used them to buy groceries, newspapers, and pay for bus rides.
Because they circulated so heavily, finding an example that looks like it just came off the dies is tough.
The "RD" designation stands for Red, which means the coin kept its bright, original mint color.
Copper naturally reacts with air and moisture over time, turning brown or red-brown.
A full red survivor from 1938 is always a special find for collectors.
Heritage Auctions sold a top-tier example of this penny for an auction record price.
The coin was certified at the ultra-high grade of Mint State 68 Red.
A grade of 68 means the penny is almost flawless to the naked eye.
You need strong magnification to spot even tiny imperfections on a coin graded this high.
Professional grading services like PCGS or NGC inspect the surface, strike, and luster before assigning such a mark.
Collectors compete fiercely for these top-graded coins because so few exist at this level.
Keep in mind that typical pocket change finds will not sell for top-tier auction record prices.
Only verified, top-condition examples command this kind of market demand.
The main driver of value here is condition rarity.
The San Francisco Mint produced millions of cents in 1938, so the date itself is not scarce in worn grades.
What is scarce is perfection.
Copper is one of the most chemically active metals used in coinage.
It tarnishes easily when exposed to sweat, humidity, or paper holders containing sulfur.
Many uncirculated rolls were saved back in the 1930s, but most developed spots or tone over the decades.
A coin that survived without scratches, bag marks, or color fading sits in a class of its own.
Registry set collectors want the single finest known piece for their sets, which drives bidding up fast.
Start by checking the date on the front of the coin, located to the right of Lincoln's bust.
Look directly under the year 1938 for the small "S" mint mark.
If there is no letter under the date, the coin was struck in Philadelphia instead of San Francisco.
Grab a 5x or 10x magnifying glass to inspect the surface details.
Check Lincoln's cheekbone, jaw, and the hair above his ear for signs of wear or dull gray patches.
Turn the coin over and look at the tips of the two wheat stalks on the reverse.
If you see any flat spots on the high points, the coin has circulated and lost its Mint State status.
Look closely at the color under a good desk lamp to see if it shows natural orange-red luster or dark brown patina.
If you want a quick scan of your coin before getting a professional opinion, a phone app like Coin Value Checker can help you take a first pass.
Never clean your penny with chemicals or cloths, as cleaning permanently ruins collector value.
If you would rather confirm before reading on, the coin valuation app picks that held up in testing is quick.