How to Spot a Fake 1943 Copper Penny

The 1943 copper penny is one of the most valuable and most counterfeited coins in American numismatics. With genuine specimens selling for over $1 million, it's no surprise that fakes abound. Here's how to protect yourself from buying a counterfeit.

Why 1943 Copper Pennies Are So Rare

During World War II, copper was needed for ammunition and other military supplies. The U.S. Mint switched to zinc-coated steel for 1943 pennies. However, a small number of copper planchets (blank coins) from 1942 remained in the hoppers and were accidentally struck with 1943 dies. Only about 20-40 genuine 1943 copper cents are believed to exist.

The Magnet Test

This is the first and easiest test. Steel pennies are magnetic; copper pennies are not.

Important:

If a magnet sticks to your 1943 penny, it's a normal steel cent—not a valuable copper error. However, passing the magnet test doesn't guarantee authenticity, as copper-plated steel fakes exist.

Common Types of Fakes

1. Copper-Plated Steel Cents

The most common fake. A genuine 1943 steel cent is plated with copper to make it appear to be the rare copper variety. The magnet test catches these.

2. Altered Date Coins

A 1948 penny is altered to look like 1943 by cutting and reshaping the "8" into a "3". Look for tool marks, uneven spacing, or a "3" that doesn't match the font style.

3. Cast Counterfeits

Made by pouring molten metal into a mold. These often have a grainy surface, incorrect weight, or soft details compared to genuine struck coins.

Authentication Checklist

Weight: A genuine 1943 copper cent weighs 3.11 grams (steel cents weigh 2.7 grams)
Magnet test: Copper is not magnetic
Date examination: Look for signs of alteration under magnification
Color: Genuine copper has a distinctive reddish-brown patina
Third-party certification: Always get expensive coins authenticated by PCGS or NGC

Think You Found One?

If your 1943 penny passes the magnet test, don't get too excited yet. Have it professionally authenticated before making any claims. The cost of authentication is minimal compared to the potential value—or the embarrassment of a fake.