 He played piccolo trumpet on Hugo Montenegro's hit version of the main theme to the 1966 film "The Good, the Bad and the Ugly".In the 1970's Klein toured and recorded as a freelance jazz musician, notably in Holland with the Ted Easton Jazzband and American trombone veteran Spiegle Willcox and tenorist Bert Noah.Klein died at the age of 86 in Los Angeles, California, on May 31, 1994.