Most collectors know that in 1943, the U.S. Mint used steel to make Lincoln pennies, saving copper for World War II efforts. But few realize that in the same year, the Mint secretly tested a small batch of experimental bronze cents—and these coins are now worth a fortune.
Unlike the famous 1943 bronze error pennies, these test pieces weren’t mistakes. They were deliberately struck using alternate metal formulas as part of government testing. Today, they’re among the rarest and most valuable Lincoln cents ever made.
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1943 Experimental Bronze Cents
During 1943, the Mint tried out various alloy combinations to potentially replace the wartime steel cent. One of the most notable experimental compositions contained:
- 91.7% copper
- 7.5% zinc
- 0.8% silver
This was no ordinary mix. The goal was to find a workable alternative to the usual bronze alloy that could still deliver a usable, cost-effective penny. These coins look different from both regular steel cents and accidental bronze errors. Their coloring is slightly off, and the coin’s details often appear weaker or more muted due to the metal blend.
Unlike error coins that slipped through the cracks, these pieces were part of planned testing—and most were never meant to leave the Mint.
How to tell if you have one
So how can you tell if that old penny in your drawer might be one of these experimental coins?
Experts typically look at:
- Color: slightly duller or unusual bronze tone
- Strike detail: softer, less-defined design elements
- Weight: different from both steel and standard bronze pennies
- Composition: confirmed via non-invasive metal analysis
The average person won’t be able to detect these traits without specialized tools. That’s why it’s important to consult a professional grading service if your 1943 cent looks unusual.
Where are they now?
Most experimental 1943 bronze cents are now held by museums or top collectors. One known specimen is preserved in the Edward C. Rochette Money Museum in Colorado Springs. It’s unlikely that many more exist—if any—outside of public or private collections.
What are they worth?
Finding one of these coins would be like winning the numismatic lottery. Values can soar past 150,000 pounds, especially if the coin is in good condition and has a traceable origin.
Their value stems from:
- Ultra-low mintage (possibly under 10 pieces)
- Unique composition not used in circulation
- Historical importance as wartime test pieces
Even among rare coin collectors, these are viewed as near-mythical items. If you suspect you have one, your first step should be authentication and grading by a certified agency like PCGS or NGC.
A collector’s dream
While these coins aren’t minting errors like the classic bronze 1943 cents struck by mistake, they are just as rare—and perhaps even more mysterious. They represent a fascinating moment in U.S. history when every ounce of metal counted, and even pennies were part of a national war strategy.
If one ever surfaces again outside of museum walls, it won’t stay unnoticed for long. And if you’re lucky enough to have one hiding in your collection, you could be looking at a six-figure treasure.
FAQs
What is a 1943 experimental bronze penny?
A rare test coin made with copper, zinc, and silver by the U.S. Mint.
How is it different from the 1943 bronze error?
It was intentional, not a mistake, and used a unique alloy.
How can I identify one?
Check the color, strike detail, and weight, and get it graded.
Where are these coins kept?
Mostly in museums like the Rochette Money Museum or private collections.
How much is it worth?
If verified, it can be worth over $150,000 depending on condition.
