Syd Mead Futurist US Steel Interface 3 sets Portfolio of Probabilities 18 prints

18 prints. Three portfolios of 6 prints each measuring 11 1/4" x 23" each. In like new condition. 1969? printing. All prints are like new. The portfolio folders are lightly worn at edges.
Portfolio titles are:
SCIENCE AND PROGRESS A Portfolio of Probabilities: Man and His Mobility in 1990 Titles of each print are: "Feedback", "Sources of Power", "The Benefit of Research", "Getting About in 1990", "Servo Mechanisms", "Computerized Automobile Design".
THE COMMONALITY A Portfolio of Probabilities: Man and His Mobility in 1990 Titles of each print are: "Megastructure", "Emergency Hyperbaric Vehicle", "Entertainment", "Group Housing", "The Showroom", "Camping Out",
THE MANSCAPE 1990 A Portfolio of Probabilities: Man and His Mobility in 1990 Titles of each print are: "The Mall", "Airport 1990", "The USS Family of Steels", "The City: 1990", "City on Wheels", "Speciality Transportation",