Looking for infos about the TOS 1 (Object 634) Buratino prototype

[XB-35]

Hi All,

I am looking for infos about the Prototype/Development vehicle (aka Object 634) of the TOS-1 Buratino prototype used for the first time in Afghanistan (in late 80's) and kept secret until 1999.

Does somebody has pictures/drawings of this (or these) development vehicle(s) ?

Thanks for the infos !

All the Best,

XB-35