Not mine. This is Dan Kramer's legendary custom 3-Fire Button Trak-Ball Controller built in Atari Inc's Consumer Engineering Division. This was used for playing the in-house "3-Base Missile Command" game for Atari 8-bit computers. Dan and others built several custom Trak-Balls there that weren't meant for the public. This one was unveiled at the 2015 Davis Atari Party.