The 1968-S Lincoln cent holds a special place in modern coin collecting.
This penny was struck at the San Francisco Mint in 1968.
The year 1968 marked the return of mint marks on United States coins after a three-year pause.
Proof coins from this era were specially made for collectors using polished dies and carefully prepared planchets.
A proof penny features sharp design details and reflective fields that differ greatly from regular pocket change.
The "RD" designation stands for Red, which means the copper has kept its original bright color without turning brown.
An exceptional example of the 1968-S proof penny crossed the auction block through Heritage Auctions.
The coin was certified in a high-grade Proof 67 condition.
A grade of Proof 67 means the coin has virtually no post-strike imperfections visible to the naked eye.
Collectors compete fiercely for copper coins that survive in this pristine state without spots or haze.
Heritage Auctions recorded the notable sale under lot listing 1/04.
Bidders paid top dollar because top-tier proof cents from the late 1960s are surprisingly difficult to find with full original red color.
Standard proof coins from 1968 were produced in large numbers for proof sets.
Most of these coins have slowly developed haze, carbon spots, or finger oils over the decades.
Copper is an active metal that easily oxidizes and turns brown when exposed to air.
Finding a piece that still grades Proof 67 Red is a true condition rarity.
Registry set collectors constantly search for the highest-graded examples to complete their collections.
That strong collector competition pushes the price of premium specimens well beyond common proof set values.
An everyday 1968-S cent from a drawer will not bring record prices, as value depends strictly on certified perfection.
Start by looking below the date on the front of the coin.
You need to spot the small "S" mint mark indicating it was made in San Francisco.
Make sure you are looking at a true proof coin and not a standard circulating strike.
Circulating cents also bear the "S" mint mark from 1968, but they lack the mirror-like fields of a proof.
Use a 5x or 10x jeweler's loupe to inspect the surfaces of the penny.
Look closely at Lincoln's bust and the open fields for any tiny dark spots or scratches.
Check the color under good lighting to see if the copper is fully red or starting to tone brown.
If you want a quick first pass on a coin in your collection, you can use Coin Value Checker to help identify its type.
Remember that a high value only applies to coins evaluated and sealed in a holder by a major grading service.
Want to price several coins in one sitting? Try the coin valuation app tools we tested side by side.