The Grandstand T.V. Game 3000 is a classic pong system sold in U.K. It can be also found under different other brands worldwide. It's in fact the same model as the T.V. Game Model 2000 but with a colour display (Model 3000 is in black & white).
The system itself seems to have been made in Korea. The electronic board is labeled "F'GAMATIC-7600". Indeed many Gamatic 7600 systems identical to this one can be found worldwide, the earliest one being a japanese Gamatic 7600 system released in 1976.
The case design is not particularly original: black rectangle with two detachable controllers and a wide control panel at the top. The controllers are also rectangular with a dial to move the bat on screen and a red button each, one to serve (left player) and the other to reset the game (right player).
As mostly all the systems powered by the TMS-1965 chipset from Texas Instruments, the T.V. Game Model 3000 offers 4 pong games : Football, Squash, Tennis and Practice delivered by this specialised chip (the TMS-1965 was pin-to-pin compatible with the more popular AY-3-8500 chip from General Instruments)
On the control panel can be found the usual setting switches: ball speed (slow/fast), automatic service (on/off), game selection, rebound angle (20°/40°), bat size (small/big) and power switch. The system can be powered by six CM2 battery cells or through an external power supply (9v DC, 360 mW).