The San Francisco Mint struck the 2002-S Lincoln cent strictly for collectors.
Unlike coins made for pocket change, proof coins are never released directly into circulation.
The mint prepared special polished dies and planchets to create this modern copper-plated zinc penny.
Workers struck each coin at least twice under high pressure to bring out every fine detail of the design.
This particular piece features the Deep Cameo finish, which creates a sharp visual contrast across both sides.
The fields look like dark, polished mirrors, while Lincoln and the lettering display a thick, frosty white texture.
Even though modern proof sets are common, finding one that survives in truly perfect condition is exceptionally difficult.
A flawless 2002-S Deep Cameo cent crossed the auction block at Heritage Auctions in May 2003.
The winning bidder paid $6,613 to take it home.
The coin received a grade of PR-70 Deep Cameo from a major grading service.
A grade of PR-70 sits at the very top of the numismatic grading scale.
It means the coin has zero post-strike flaws, zero scratches, and zero handling marks under magnification.
Most proof cents leave the mint with tiny, invisible imperfections that immediately knock them down to PR-69.
Because top-tier collectors compete fiercely for perfection in registry sets, this single perfect grade drove the price to an astonishing record.
Modern minting technology is better than ever, but total perfection is still an elusive target.
The United States Mint produced millions of proof sets in the early 2000s.
Most of those coins grade at PR-68 or PR-69 DCAM.
Copper-plated zinc is a reactive metal that spots easily when exposed to microscopic moisture or air.
Planquet flaws, tiny contact marks during packaging, and faint die haze can all ruin a coin's chances at a 70.
To earn a PR-70, a coin requires flawless execution during striking, handling, and long-term storage.
Registry set collectors want the highest-graded example known for every single year in the Lincoln series.
When very few coins achieve that top grade, serious bidders push the price far beyond ordinary proof values.
Start by checking the date on the front of the coin for the year 2002.
Look directly below the date for a clear "S" mint mark, which shows the coin was made in San Francisco.
Do not confuse this coin with regular business-strike 2002 pennies made in Philadelphia or Denver.
Look closely at the surface contrast under a direct light source.
A genuine Deep Cameo proof will have heavily frosted devices that stand out boldly against deep, reflective fields.
Use a 5x or 10x jeweler loupe to inspect the surfaces of the coin carefully.
Check for tiny copper spots, haze, hairline scratches, or minor strike weakness on Lincoln's coat and hair.
Even a single micro-scratch or tiny milky spot means the coin will not grade as a perfect PR-70.
If you want a quick first look at your coin, you can use the CoinKnow or Coin Value Checker app to help identify its basic type.
Keep in mind that standard 2002-S proof cents in typical grades sell for modest sums.
Only certified, completely flawless PR-70 examples command four-figure prices at major auctions.
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