This is the same Viper Green 1972 911 S as in the post above. These cars are all in front of the famous rennenhaus, located at 4th and Broadway, Denver Colorado. Owned and operated by the late Grady Clay. The front car is an RSR, followed by Grady's 904, 356 Carrera, 74 RS and the Viper Green S. Picture from the late seventies.