The 1974 Lincoln Penny: a common find in change jars, yet some have unique worth.
Made of 95% copper, 5% zinc, it's the metal composition that partly determines value.
Most are worth face value, but errors and mint marks can increase a penny's value.
Look for the mint mark: 'D' for Denver, 'S' for San Francisco, none for Philadelphia.
Error coins, like doubled dies or off-center strikes, can be worth much more.
Condition matters: uncirculated or proof pennies can fetch higher prices.
Special varieties, like aluminum or bronze-clad, may exist and be highly valuable.
Check for the 1974-S penny with a doubled die obverse, a collector's gem.
Always consult a coin expert or use a guidebook for accurate appraisal.