Major collectors might hate this being shared… but this information can literally change the value of a single penny 
If you ever come across a 1943 steel penny, you need to stop and check it carefully. There are three major things that can make these coins worth hundreds to tens of thousands of dollars — and most people miss them.
Save this guide. This is the reference you’ll want every time you find one.
Why 1943 Steel Pennies Matter
In 1943, the U.S. Mint stopped using copper for pennies due to World War II and switched to zinc-coated steel.
These pennies were only supposed to be made in 1943 — which is why errors from this year are so valuable.
Now let’s get into the three most important things to look for 
Step 1: Check the DATE (The $30,000+ Error)
This is the most well-known — and the most valuable 
Steel pennies should ONLY say 1943
If you find a steel penny dated 1944, you’re looking at a gigantic mint error.
Why it matters:
- 1944 pennies were supposed to be copper
- A steel planchet used in 1944 is a major mistake
These 1944 steel pennies regularly sell for $30,000+, depending on condition and authentication.
Always check the date first.
Step 2: Look for a 1943 Overdate (43 Over 42)
Now check the date again — but this time, look very closely 
You’re looking for:
- A protruding shape on the “3”
- A small curve that doesn’t belong
This indicates a 1943 over 1942 overdate.
Value:
- In decent condition, these sell for $350+
- Higher grades = even more
This error is subtle and often missed by beginners.
Step 3: Check the Mint Mark (43-D Over D)
If your steel penny has a D mint mark, this step is critical.
Look closely at the “D”:
- You may see the outline of another D underneath
- This is called a repunched mint mark (RPM)
Known as: 1943-D / D
Value:
- In decent condition, these go for $300+
- Sharp examples can bring more
Final Thoughts: Don’t Miss These Again
These three checks can mean the difference between:
A $0.50 coin
A $300 coin- Or a $30,000+ life-changing find
Now you know what many collectors don’t want casually shared.
So next time you see a 1943 steel penny:
Check the date
Inspect the numbers
Examine the mint mark
Knowledge is profit in coin collecting 
