$500,000 Proof Coin Without
🚨 These Proof Coins Should Have an “S” — If They Don’t, You Could Be Rich
Imagine finding a proof coin in your collection… and realizing it’s missing the “S” mint mark.
That tiny missing letter has turned ordinary proof coins into auction legends — including one that sold for nearly half a million dollars.
Today we’re revealing six proof coins without a mint mark that collectors aggressively chase.
Pay very close attention — because proof coins look different from regular coins.
🪞 First: What Is a Proof Coin?
Proof coins are specially struck for collectors.
They feature:
✔ Mirror-like fields
✔ Sharp, frosted devices
✔ Exceptional strike detail
✔ Usually an “S” mint mark (San Francisco Mint)
If a proof coin from the San Francisco Mint is missing its “S”…
That’s when things get serious.
🥇 #1 – 💰 $450,000+ 1975 No S Proof Dime
The king of modern No-S errors.
1975 No S Roosevelt dime
This coin was struck as a proof — but without the required “S” mint mark above the date.
Only a tiny number are known to exist.
One sold for nearly $500,000 at auction.
Yes — half a million dollars for a dime.
🥈 #2 – 💎 $22,000 1968 No S Proof Dime
1968 No S Roosevelt dime
The first year proof coins moved to the San Francisco Mint.
They were all supposed to have an “S”.
Some didn’t.
Auction results have reached:
💰 $22,000
The missing mint mark is located above the date on the obverse.
🥉 #3 – 💵 $600–$750 1970 No S Proof Dime
1970 No S Roosevelt dime
Again, look above the date.
If the proof dime lacks the “S”, collectors pay strong premiums.
Typical sales range:
💰 $600 to $750
🏅 #4 – $12–$14 1971 No S Proof Nickel
1971 No S Jefferson nickel
While not as rare as the dimes, these still carry collector value.
The mint mark should appear to the right of Jefferson.
If missing on a proof strike:
💰 Sells for $12 to $14
Modest — but still above face value.
🏅 #5 – $500 1983 No S Proof Dime
1983 No S Roosevelt dime
Another missing “S” above the date.
Auction values hover around:
💰 $500
Proof condition is critical — circulation coins do not count.
🏅 #6 – $3,500 1990 No S Proof Penny
1990 No S Lincoln cent
The mint mark should appear under the date.
If missing on a proof coin:
💰 Approximate value: $3,500
This is one of the more popular No-S proof Lincoln cent errors.
🔍 How to Tell Proof vs Regular Coins
Many people mistake circulation coins for proofs.
Here’s how to tell the difference:
🪞 Proof Coin:
- Mirror background
- Sharp strike
- Deep contrast
- Usually from proof sets
🪙 Regular Coin:
- Dull surface
- Standard strike
- No mirror finish
If your coin does not have a mirror finish — it is NOT a proof.
⚠️ Important Warning
✔ The coin MUST be proof
✔ It MUST be missing the “S” mint mark
✔ It MUST be authenticated
Professional grading through:
- Professional Coin Grading Service
- Numismatic Guaranty Company
is essential before assuming value.
Many fake or altered coins exist.
📊 Quick Value Summary
| Coin | Approximate Value |
|---|---|
| 1975 No S Proof Dime | $450,000+ |
| 1968 No S Proof Dime | $22,000 |
| 1990 No S Proof Cent | $3,500 |
| 1970 No S Proof Dime | $600–$750 |
| 1983 No S Proof Dime | $500 |
| 1971 No S Proof Nickel | $12–$14 |
🎯 The Final Mint Mark Mystery
All it takes is one missing letter.
A tiny “S”.
That small detail has created:
- Six-figure auctions
- National headlines
- Life-changing discoveries
Proof coins are meant to be perfect.
When they’re not — collectors pay big money.
Check your proof sets carefully.
Because one missing mint mark could be worth more than a house.
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