Wow, that's way cool! It almost looks like a part of the Eagle's wing on the Obverse, but what a way neat looking coin! So this is a clash, what a lot of stuff going on OBV and REV, Lucky you! Thanks for sharing that one.
This '84 looks similar in strength. http://maddieclashes.com/adc-25c-1984-01.html I'm sure they would want to list it. It's strong!
I'm tring to get five, I have thoses 2, 2013-P dimes, this 1, and a 1997 dime, the 97 has grinding done on the dies