Color TV-Game Block Kuzushi © 1979 Nintendo.
This dedicated console features 6 arcade games:
1. Block Out
2. Block Easy
3. BLock Safe
4. Block Through
5. Block Lighter
6. Block Killer
[Model CTG-BK6]
The game was launched in April 1979 with a retail price of ¥13,500. Later in the same year, the price reduced to ¥8,300.
The model number "CTG-BK6" is short for "Color Tv Game Block Kuzushi 6"