I've never seen this before. Cut-back frame under barrel, thick grips. Made by Renato Gamba under license from Mauser. Listed on GB.
No mention of what the 'Super ACP' means (it's stamped on slide).
Anyone have any information on this variation???
Mauser-Werke Model HSC Super .380 ACP
https://www.gunbroker.com/item/799311627