For the Richard Nixon administration, the White House commissioned a state limousine based upon a 1969 Lincoln Continental, bodied by Lehman-Peterson of Chicago, Illinois. While again adopting the armor plating and bulletproof glass and other security features of SS-100X, to allow the President to stand upright and greet constituents from the motorcade, a sunroof was added to the vehicle above the rear passenger compartment. Used by President Nixon until 1974, the car is located at the Nixon Library in Yorba Linda, California.