There appears to be a rim cud, but the edge also looks damaged and there is a bulge on the obverse at that point. Could there be corrosion of the copper, from the damage, that caused the bulge?
The area that you call a 'rim cud' is metal pushed onto the surface, from the edge - see the flattened area on the edge? It's damaged on both sides, in that area. That's the metal pushed onto the reverse.
DEFDAM - Definitely Damaged @Kaye Here is a website to help you understand a true Cud http://cuds-on-coins.com Fred who posted before me is an advisor for the website.
