Colour TV Game © 1978 Binatone.
It is the first of the "Colour TV game" series and offers 4 pong games (squash, squash practice, football, tennis).
It's technically the same as the "TV Master MK IV [Model 01-4974]" but with color graphics.
Model 01-4931
1. Colour TV Game [Model 01-4931] (1978)
2. Colour TV Game 4 Plus 2 [Model 01-4850] (1978)
3. Colour TV Game MK 6 [Model 01-4761] (1978)
4. Colour TV Game MK 10 [Model 01/4842] (1978)