I think a good argument can be made for 1977 or 1978 https://en.m.wikipedia.org/wiki/Color_TV-Game https://en.m.wikipedia.org/wiki/Color_TV-Game They came out

I think a good argument can be made for 1977 or 1978 https://en.m.wikipedia.org/wiki/Color_TV-Game https://en.m.wikipedia.org/wiki/Color_TV-Game They came out with a 3rd machine in June of 1978. The commercial features the first two machines. There's many plausible reasons for this including, most prominently, that the third might not have been released yet. Certainly not definitive but likely