You might be able to add this over/under to the self [assisted] opening list. It is an odd side opening, over/under with ejectors. There are no proofmarks on it, so I am not sure of it's country of origin.

[Linked Image from i.imgur.com]

[Linked Image from i.imgur.com]

Last edited by Daryl Hallquist; 06/11/23 12:05 PM.