Where can you find information about a 12 gauge double barrel shotgun marked Marixa Eibar Made in Spain Volunteer Blumenfeld Co and Menphis - not Memphis?

There is no readily available information or evidence that indicates the existence of a 12 gauge double barrel shotgun marked "Marixa Eibar Made in Spain Volunteer Blumenfeld Co and Menphis." It's possible that this may refer to a specific firearm that was custom-made or modified, and as such, it may not be widely known or documented in standard sources.