You mean this one?
the 103, yeah
really innovative design, and for 1963?? mind blowing really
For those not in the know;
>reliable autoloader gets off a 105mm round every 3 sec
>fixed gun and lack of a 4th crew (the loader) makes for an extremely low silhouette with radical frontal slope
>excellent track system, the entire vehicle can traverse 90 degrees in just over a second
>innovative hydraulic suspension to set gun elevation
>only MBT in the world that can be fought by one person, both the driver/gunner and the commander position have full mobility and gunnery controls
>and perhaps my favorite, 3rd crew member sits facing backward and has mobility controls, the vehicle can move just as fast in reverse.