The final console in the series is the Computer TV-Game (コンピューターテレビゲーム Konpyūtā Terebi-Gēmu). Released in 1980, it was sold and produced in limited quantities. The only game in this console is a port of Nintendo's first video arcade game, Computer Othello. The game can be played head-to-head by two people, or against a computer and was quite sophisticated for the time. Nintendo managed to convert it from an arcade game by simply integrating a complete arcade board which made the machine big and heavy. The power supply weighs more than two kilograms. The console cost ¥48,000 upon release. Comparatively, the Famicom, which came out only 3 years later, cost a third of the price and can play hundreds of games.
Source: Wikipedia, "Color TV-Game series", available under the CC-BY-SA License.