"hidden" windshield wipers. Also new for 1968 was a stylish beveled deck lid. The $6,867 vinyl-roofed Sixty Special Brougham sold 15,300 models this year, while the standard Sixty Special with its painted metal roof (priced at $6,552) sold just 3,300 cars. Most Cadillac buyers clearly considered the $315 price difference insignificant. All-new styling appeared in 1969, and the two Sixty Special models had distinct rooflines from the other Cadillacs. A 60/40 split bench seat was standard in the Sixty Special Brougham, optional in Sixty Special. Safety was a new priority at Cadillac, which introduced a new steering column that not only was designed to absorb impact and collapse in a collision, but also had new Federally-mandated theft-deterrent features such as an ignition key switch activated steering wheel and transmission shifter lock mechanism. As also mandated, head rests were standard on front seats, while seat belts were provided for all six passengers. The engine carried over from 1968. Also of note this year was the disappearance of the small vent windows on the front and rear doors. Sixty Special Brougham, at $7,092, included a vinyl roof top (available in six colors), as well as rear-seat foot rests and an automatic level control for the rear wheels which kept the car level despite the weight of fuel, passengers, or cargo. Sixty Special Brougham's sales of 17,300 units easily surpassed the 2,545 copies of the standard $6,761 Sixty Special. The 1970 Sixty Special received few changes, aside from the usual new grille and tail lamps. Sixty Special had long been recognized for its bold, bare side body, but this year the models received a 'chrome with vinyl insert' body-side molding – the model's first prominent side molding since the 'rocket-ship' 1958. Sales were 16,913 units of the Sixty Special Brougham at $7,284; and just 1,738 M Sixty-Specials at $6,953. This would be the last year for the standard, metal-roofed Sixty Special. 1971–1976 The new GM full-size bodies for 1971, at 64.3 inches front shoulder room (62.1 inches on Cadillac) and 63.4 inches rear shoulder room (64.0 inches on Cadillac) set a record for interior width that would not be matched by any car until the full-size GM rear-wheel-drive models of the early to mid-1990s. Following this remodel, the Sixty Special remained basically unchanged through 1976, save for periodic front and rear-end facelifts. The car shared the same styling cues with the lesser Calais