The Cadillac Sixty Special is a name used by Cadillac to denote a special model since the 1938 Harley Earl–Bill Mitchell–designed extended wheelbase derivative of the Series 60, often referred to as the Fleetwood Sixty Special. The Sixty Special designation was reserved for some of Cadillac's most luxurious vehicles. It was offered as a four-door sedan and briefly as a four-door hardtop. This exclusivity was reflected in the introduction of the exclusive Fleetwood Sixty Special Brougham d'Elegance in 1973 and the Fleetwood Sixty Special Brougham Talisman in 1974, and it was offered as one trim package below the Series 70 limousine. The Sixty Special name was temporarily retired in 1976 but returned again in 1987 and continued through 1993.