The Invicta series was introduced as a full line of body styles for model year 1959. Sales never approached that of either the entry-level LeSabre or top level Electra models, but were consistent with the traditional sales penetration of Buick's sporty mid-priced models (the 1954 to 1958 Century and 1963 to 1970 Wildcat). The Invicta continued the tradition of installing Ventiports on the front fenders from the Century.