Commonly categorized as a "RUBY" type pistol coming from the early 20th century cottage gunsmith industry in the Eibar region of Spain with fixed sights, blue trigger and safety latch, push button magazine release, grip safety and checkered hard rubber grips. The left side of the slide is marked "AUTOMATIC PISTOL BOLTUN PATENT" over the trademark and caliber designation.

Manufactured in Spain as part of the early 20th century cottage industry. Very similar to the "Ruby" type pistols of the Eibar region. Standard Spanish proof marks. With fixed sights, standard lumpy type safety switch above the trigger, checkered molded grips and a lanyard ring at the heel.