 Televisions first network color broadcast. However, commercial  production of the first television set compatible with the CBS field  sequential color system did not begin until September 1951, leaving  only prototype models available for viewing this special in June  1951. Variety estimated that only 30 color receivers were available  in the New York area. The show was relayed by cable to CBS  affiliates in four other cities (Boston, Philadelphia, Baltimore,  and Washington), which then broadcast the special over the air.