It's a very nice dime. What do you think. Missing most of the 7 and some of the mint Mark. The reverse does not look affected. It's been sitting in a jar for 40 years.
It’s design devouring die deterioration. That’s evident by the striations in the outer fields. http://www.error-ref.com/?s=Design+devouring+die+deterioration+
Sitting in a jar for 40 years? Hardly! It looks like a 1987 to me! Grease-filled dies are a dime-a-dozen. Spend it! ~ Chris