T-83 [1976]
In the early 1970s, the Kalashnikova Design Bureau was tasked at designing and building the first Turbine engine powered tank of the Yaztogran Federation. They took the design of the previous T-68B's hull and used the T-68A Turret, they also enchanced its hull armor thickness.

T-83B
Improved model of which the tank receives a new Turret and the new 2A48 125mm Main Cannon that can fire an ATGM. This model also has new laser rangefinders, a new autoloader, and a new fire control system [Yes this was all taken from the T-80B's Wikipedia page but it is based on that tank anyway, it still has some major differences from it]

Armaments:
125mm 2A48
12.7mm Turret MG

Controls:
Camera controlled Turret
Pitch and Roll = Hull maneuvers
Select Cannon to activate it