Today's WT is a Soviet X-26, basically just a four-legged version of the familiar Soviet T-26 light tank. It has four crew members, three in the turret and the driver sort of in between the hull and turret.
I'll say armor is about 60mm max (on the gun mantlet) but otherwise it only has about 30mm of armor elsewhere, on average. It has a 76mm gun with a coax 7.62mm MG, with 4x 12.7mm MGs two in the hull with another two on a AA mount on top of the turret. The purpose of the vehicle would be infantry support and general battling.-Andrew