I have this 1952 dime for probably 20 - 25 years, and only saved it because it was a silver coin. The damage to the top left head of the coin corresponds to the bottom left tail of the coin.
IMHO, looks like post mint to me. To many scratches. Looks like someone took a knife or something to it, but God knows I have been wrong before. Keep it though, it is silver. :thumb: Phoenix