Most 1990 pennies are worth just one cent — but a special proof coin from that year, missing its mint mark, has sold for over $5,000! If you’ve inherited coin collections or have old proof sets, this could be your hidden treasure.
What Makes This 1990 Penny So Valuable?
This isn’t just any penny — it’s a proof coin struck with a mirror-like finish and missing the “S” mint mark that should appear under the date.
Key Features:
- Proof Finish – Highly reflective, mirror-like background
- No “S” Mint Mark – Look below the date; it should be blank
- Year – Must be 1990 and from a proof set
Auction Highlights
- Recent Sale: Over $5,000 for a certified example in top condition
- Collectors’ Demand: Extremely rare error, sought after for proof set collections
How to Check Your Coins
- Find Your Proof Sets – Especially 1990 editions
- Inspect the Penny – Use good lighting or a magnifier
- Look for the Mint Mark – If the “S” is missing, you may have a jackpot coin
Tip: Proof coins are usually kept in clear plastic cases within proof sets — check before opening or touching them.
Don’t Get Fooled
- Some worn pennies may look like they have no mint mark — only proof coins without the “S” are valuable.
- Always certify with PCGS or NGC before selling to get top dollar.
Join the Hunt
Many people inherit coin collections without realizing what’s inside. That $5,000+ penny could be sitting in a box in your closet right now!
Drop a photo of your coin in the comments — our experts will analyze it for free.
