The 1960 Winter Olympics at Squaw Valley were the first to use this brand of ice-resurfacing machine
In 1960, Zamboni 
supplied six ice-resurfacing machines to the Winter Olympics in Squaw Valley,... [DOC] [TLE] Ice resurfacer - Wikipedia [PAR] In 1959, the Zamboni Company built its first electric powered ice resurfacer which 
was used for the Squaw Valley Olympic Games in California in 1960.