Hi- ran across this coin because of the notch, then noticed the high bump on the D that looked like doubling. Closer inspection shows the following. Thoughts? Looks different than the two on variety vista if it's actually a DDO, and all the others on here don't have this kind of definition. (Also, any feedback on a notch like this is appreciated.) Thanks &
It looks like what is called "split plate doubling", which is not really an error. The copper plating splits during the strike and exposes some of the zinc core. This can lead to corrosion and bubbling around the splits, which can look like doubling because of the way it follows the letters/numbers.
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