Bust Half Dime. . wonder what caused parts of the coin to be missing,, this coin is in really bad shape...
One of those coins that you almost wish could talk..... If I was to reason a guess, I would say that it was holed and worn as an adornment until it was worn so much that the hole just gave way.
Well, it's a Capped Bust Half Dime, minted from 1829 through 1837. Can't tell anything else about. Probably wouldn't straight-grade.
As @Randy Abercrombie indicated, it's pretty apparent it was once holed for jewelry or a similar purpose (many of these were). But the metal around the hole subsequently broke off.