The western was by far the predominant B genre in both the 1930s and, to a somewhat lesser degree, the 1940s; for most of the Golden Age, westerns of every stripe accounted for 25 to 30 percent of all Hollywood feature production. Film historian Jon Tuska has argued that "the 'B' product of the Thirties—the Universal films with , , and , the Columbia features with Buck Jones and Tim McCoy, the RKO George O'Brien series, the Republic westerns with John Wayne and the Three Mesquiteers...achieved a uniquely American perfection of the well-made story." At the far end of the industry, Poverty Row's Ajax put out films starring Harry Carey, then in his fifties. The Weiss outfit had the Range Rider series, the American Rough Rider series, and the Morton of the Mounted "northwest action thrillers" that gave top billing to Dynamite, the Wonder Horse and Captain, the King of Dogs. One notable low-budget western of the era, produced totally outside of the studio system, made money off a curious concept: a western with an all-midget cast, "The Terror of Tiny Town" (1938) was such a success in its independent bookings that Columbia picked it up for distribution.