This comic book was a series of volumes without cover titles that contained four stories per issue. The first issue was published by Giusto Vaglieri in Milan, Italy from 1957 - #25 in 1966 under the direction of Giusto Vaglieri. The covers were plastic-coated and feature exclusively western themed images made by Spanish authors. From #12 to the foliation is added a sixteenth with prose novels and columns. Not all copies of the same number collect the same books. Each book consisted of 192-208 pages.