Funky coin! A healthy GW 25c in 1984 should be "75% Copper, 25% Nickel over a pure Copper center" per PCGS. Looks like environmental damage. If you have a scale, a 1984-D in mint shape should weigh 5.67 grams on average, but severe damage can change that number a bit. With a pure copper center, perhaps the nickel is largely gone. That's my best guess, but others here know a lot more about these things.
Stay well,
Diy89Nurm7
Stay well,
Diy89Nurm7



























