In the early 1960s Continental added flights from Los Angeles to Houston, nonstop as well as via Phoenix, Tucson, El Paso, Midland-Odessa, Austin, and/or San Antonio. In 1963 the company headquarters moved from Denver to Los Angeles. By late 1963 Continental had discontinued service to most of its smaller cities in Kansas, Oklahoma, New Mexico, and Texas with the exception of Lawton, OK and Wichita Falls, TX which continued operating with DC-9 and 727 jets until 1977. Total passenger-miles in 1967 were more than five times greater than in 1960, but 61% of the 1967 total was on unscheduled flights (mostly transpacific charters). During the late 1960s the company disposed of the last of its turboprop and piston-powered aircraft—one of the first U.S. airlines to do so. Continental replaced the Viscount fleet with Douglas DC-9-10s and then added Boeing 727-100s and 727-200s. The DC-9 and 727 were to become the workhorses of the fleet from the late 1960s. The DC-9s were phased out by the late 1970s (although the type reappeared after mergers in the 1980s with an example being Texas International Airlines DC-9s which were added to the CO fleet); the 727-200 was the mainstay of its narrow-body fleet until the late 1980s. In 1968 a new livery was launched: orange and gold cheatlines on a white fuselage; and a black "jetstream" logo (by Six's friend, the noted graphic designer Saul Bass) on the iconic "Golden Tails" of the airline's aircraft. The slogans adopted in 1968 and used for more than a decade were, "The Airline That Pride Built" and, "The Proud Bird with the Golden Tail". 1960s saw international routes awarded to Continental (to New Zealand and Australia) in the Transpacific Case, but they were cancelled by the Nixon Administration.