The 1973-S Lincoln cent was struck at the San Francisco Mint as a special proof coin for collectors.
Proof coins are made using polished dies and specially prepared blanks to create sharp, mirror-like surfaces.
During the 1970s, the mint produced millions of proof sets for the public.
Most of these proof pennies had a standard shiny finish across the entire surface.
Only a small fraction came off fresh dies with a heavy frosted texture on the raised design.
Collectors refer to this strong visual contrast as a Deep Cameo, or DCAM finish.
Finding a 1973-S cent with this intense contrast makes it stand out from typical proof pennies of the era.
Heritage Auctions handled the sale of this particular 1973-S DCAM Lincoln cent.
The coin was certified by professional graders at a perfect grade 70.
A grade 70 represents absolute perfection under five times magnification.
It means the coin has no post-strike flaws, no hairline scratches, and no contact marks anywhere.
The auction listing recorded a winning price listed as 01/04 through HA.
Top-tier registry set collectors compete fiercely for perfect modern proof coins.
That level of competition is why a certified top-grade example reaches high auction figures.
Modern proof coins are common in general, but absolute perfection is not.
The mint dies wear down quickly as they strike thousands of copper-alloy planchets.
As the dies wear, the heavy frosted texture begins to fade into a regular brilliant finish.
This means only the earliest strikes from a new pair of dies carry the true Deep Cameo effect.
Even among coins that earn the DCAM designation, tiny spots or carbon flecks often develop over time.
Copper surfaces react easily with moisture and air, making spotless preservation difficult.
A coin that maintains a flawless surface with full contrast for decades is an extreme condition rarity.
Collectors who build high-end Lincoln cent sets are willing to pay a premium for that perfection.
You will need a magnifying loupe and good lighting to inspect your coin properly.
First, check the date below Lincoln's bust to confirm the 1973 date and look for the small "S" mintmark underneath it.
Next, examine the flat background fields of the coin.
The fields should look like a clean, dark mirror with deep reflectivity.
Look at the raised portrait of Abraham Lincoln and the Lincoln Memorial on the reverse.
These raised details should appear thick, chalky, and frosted white against the mirrored background.
If the frost looks patchy, weak, or matches the shine of the fields, it is a standard proof rather than a DCAM.
Inspect the surfaces closely for tiny red spots, fingerprints, or haze that lower the grade.
If you are not sure what you have, a mobile tool like Coin Value Checker can do the first pass for you.
Remember that standard pocket change will not have these mirrored proof surfaces.
Only coins that were originally issued in official government proof sets have a chance at this designation.
If you just want a quick number without the guesswork, see the coin valuation app picks that held up in testing.