Gun: 73 mm
This photo is taken in shed # 2 at the Kubinka Armour Museum 50 km outside Moscow. I shows a vehicle with the name Object 775, an odd creature of a missile tank with practically no turret reaching above the hull and thus making a very low profile.
It was developed under supervision of chief engineer P.P. Isakov.
This experimental tank was made in 1962 and was a relative of the T-64, whose chassis it probably was built on.