There is no specific information available about a Nintendo Tunnel B1 1996 poster. The game "Tunnel B1" was released in 1996 for MS-DOS, PlayStation, and Sega Saturn, but it was not developed or released for any Nintendo console at that time12. However, a mini poster for the game does exist, measuring 42x30cm, which was associated with the PlayStation and Sega Saturn versions4. If you are looking for posters related to this game, they might be rare and primarily associated with the platforms it was released on.