The first products manufactured by the new firm were revolvers, produced under three different brand names: El Casco, Duque and Tejón. A very wide range was manufactured, in .38 and .32 calibres and with 2 ½, 3 ¼, 4 ½, 4 ¼, 5 and 6 inch barrels.
Literature and advertisements of the time announced that the products were “extra” high quality.
Numerous different machines were required for manufacturing and testing the parts (drills, augers, lathes, milling machines, presses, reaming machines, copying machines, buffers and electroplating baths), and so a very wide range of knowledge and skills must have been required for their production.