The Ugartechea Family is still in charge of the company which is a basic principle, as they are the ones who know better how to optimize the manufacture of these firearms, which combine with craftsman work the best technology.

More importantly, Ignacio Ugartechea in the early days made the Model 1031 Número 6 side by side shotgun to ex-president of Mexico General Álvaro Obregón, also double rifle an 8x65R Brenneke, for the Caudillo himself in 1943, Generalissimo Francisco Franco and then Armas Ugartechea was passed on to the first Ignacio's son.

In 1928 they granted the trademark EL CASCO and requested registration of an industrial drawing to make a specialized shotgun catalog.

In the census carried out in 1929, Ignacio Ugartechea appears as a manufacturer of shotguns and pistols for the "San Humberto" brand to distinguish all kinds of short and long arms, obtaining in 1933 patent no.

129218 defined as "overlapping barrels for hunting shotguns joined and aligned by means of flat surfaces” and number 131047 for “a hidden key system for hunting shotguns, equipped with a safety interposition of another piece in advance of the firing pin that prevents the weapon from being fired accidentally”.

[1] The second Ignacio Ugartechea was trained in the tradition of gun making at the prestigious Escuela de Armeria in Eibar.

[3]Armas Ugartechea originally made matched pairs of sidelocks guns for export to England.

Famous gun owners have included Ernest Hemingway with the model Dixon-Falcon [4] among other notable clients.

[5][6] Eventually, the sidelock fad passed and the simpler and less expensive boxlock action gained popularity.

In the United States, consumers were generally looking for a gun with the features of the traditional English shotgun, but not the corresponding steep price tag.

Up until this point, Armas Ugartechea traditionally spent less time on its boxlock guns, producing mainly lower-end offerings.