Some 1975 Roosevelt dimes, at first glance just 10-cent coins, are selling for astronomical prices online. Knowing which coins to look for can turn a dime in your pocket into thousands — or even hundreds of thousands — of dollars 
.
All prices below are backed by real auction results from top auction houses like Heritage.
Key Features to Spot Valuable 1975 Dimes
- Mint Mark
- D = Denver
- S = San Francisco
- No mint mark = Philadelphia
- Coin Type
- Proof Coins: Mirror-like finish, struck individually at San Francisco
- Mint State (MS) Coins: Circulation-quality, struck at Denver or Philadelphia
- Full Bands (FB)
- Look at the torch on the back
- Horizontal bars at the top of the torch = full bands
- Hardest area to strike and get fully detailed
- Only valuable if the coin is Mint State
- Errors
- Oversized/overpunched mint marks
- Wrong planchet (e.g., copper penny planchet used)
- Missing mint mark on proof coin
Top Valuable 1975 Roosevelt Dimes
1975-S S Over Mint Mark — $37
Mint: San Francisco
Error: Oversized S mint mark- Sold for: $37
1975-S Proof 70 — $71,432
- Mint: San Francisco
Grade: Proof 70 (flawless)- Perfect strike and mirror-like finish
- Sold for: $71,432
1975-D MS67 Full Bands — $2,760
- Mint: Denver
- Grade: MS67 (PCGS)
Full bands on the torch- Sold for: $2,760
1975-D Struck on Copper Planchet — $2,760
- Error: Used penny planchet (2.6 g)
Appearance: Looks like a penny but has Roosevelt design- Sold for: $2,760
1975 Proof Coin with No Mint Mark — $456,000
- Mint: Should have S mark (San Francisco)
- Error: Proof coin with no mint mark (Philadelphia proof error)
- Extremely rare and highly desirable
- Sold for: $456,000
Collector Tips
- Always check mint mark location and condition
- Look for full bands and proof finishes
- Unique errors can exponentially increase value
- Professional grading (PCGS or NGC) ensures authenticity and maximizes price
Even a small 10-cent coin can be worth tens of thousands or more if it meets the right criteria.
