Interesting. I own this one: And then there's this one from Münzen & Medaillen 37, November 23, 2012: Post your die-clashes!
The Maesa period has more clashed die coins than any other. I have way too many die clash coins and can not explain the appeal they have to me. I believe my favorite is this Constantine I which was doublestruck with the reverse die clashed so you see the 'shadow' repeated offset the same as the doublestruck obverse. More unusual is this Julia Mamaea with obverse showing traces of a clash with the revers type but I suspect that it was damaged by a different reverse of the same type and that die was destroyed in the clash and replaced by the fresh die shown here. That is a guess but all I have.
Just to show severe damage is possible, this Clodius Albinus as Augustus reverse clash not only shows incuse letters at the bottom and border dots at the top but raised metal cud at upper right where it seems a chunk fell out of the die. I might have thought that would have been enough to retire the die but perhaps they needed coins and did not have a spare ready to go.