[MarkSheppard]

Okay, lets see, the following is from Stephen J Zaloga's T-64 and T-80 books with Concord:

T-64R - This is the pre-series production type with the D-68 115mm gun, Ammunition was 40 rounds, of which 30 were in the Korzina autoloader, Total production was about 600 tanks.

T-64 - This was the initial production version with the 125mm D-81T gun. This version had the ZIP tool stowage bin on the right front side and no rear turret stowage bin. Most of these were later modernized as T-64A (rebuild).

T-64A - The T-64A was the first major production series of the T-64 family, It incorporated a number of changes from the initial T-64R and T-64. The ZIP tool stowage box on the right front fender was replaced by an additional fuel cell. A substitute ZIP tool stowage box was added behind the turret, The T-64 had a variety of other internal improvements added. Total production was over 1400.

T-64A (rebuilt) - The T-64A(rebuilt) is a rebuilt T-64 or T-64A, incorporating the new improvements found on later T-64 models. This includes substitution of a rubber side skirt for the gill armor, addition of glacis plate hull armor applique, stowage improvements and other small changes.

T-64B - The T-64B was a redesign of the T-64 to incorporate a new generation of hull and turret armor which was not as bulky as the 1st generation Combination K armor on the T-64A, while offering the same or better protection. The T-64B also introduced the new 9M112 Kobra radio-command guided anti-tank missile (AT-8 Songster), This missile requires a radio-command antenna box, which is fitted immediately forward of the commander's right turret station, A new gunner's sight was fitted which included a laser rangefinder, making the right hand portion of the coincidence rangefinder unnecessary. The T-64B carries 36 rounds of conventional ammunition and 6 Kobra missiles, compared to 37 rounds of 125mm ammunition on the T-64A. This version was called SMT M1980/2 by NATO. When fitted with smoke mortars, it was dubbed SMT M1981/1.

T-64B1 - The T-64B1 is an upgrade to the T-64B, although details of specific improvements are lacking. It may distinguish between new-build T-64Bs, and tanks rebuilt to T-64B standard on the basis of older T-64As during periodic rebuilding, The T-64B1 is on uncommon type with only about 400 built compared to over 1200 T-64B,

T-64BV/T-64B1V - The -V designator identifies tanks retrofitted with explosive reactive armor (ERA), This type of armor was developed under the direction of V.N.Bryzgov at the Nil Research Institute of the Main Armor Directorate at Kubinka in the Moscow suburbs.

T-64 Command Tanks - There are three command tank versions of the T-64 series. These types ore identified by a "K" suffix after the usual designation. The command types have an additional command radio compared to the usual radio fit, and usually have a land navigation device, less ammunition and an additional external radio antenna storage tube. The three main command types of the T-64 family are the T-64AK, T-64B1K and T-64BV1K, The T-64AK was not fitted with the usual 12.7mm NSVT machine gun over the commander's stotion, Additional types on other variants may also hove existed in the past, but hove been consolidated into these types by 1990.

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T-80 - This is the basic production version of the tank, It is sometimes nicknamed the "Kobra", due to its use of the 9M112 Kobra radio-command guided missile, This is a relatively uncommon type, and only a few hundred were built.

T-80B - Sometimes nicknamed Beryoza (birch Tree), this is the first major redesign of the T-80 family with a modified turret. The turret incorporates a new generation of Composite K ceramic armor which offers better protection against APFSDS kinetic energy penetrators. The turret has an equivalent protective level of 500mm steel compare to 410mm in the earlier models and the T-64. This is the most common variant of the T-80, with over 3,500 in service with Soviet tank units west of the Urals as of 1990. The T-80BK is the command tank variant.

T-80BV - The T-80BV is the T-80B fitted with 1st generation explosive reactive armor. The T-80BVK is the command tank version, There is also a late production type with a new turret similar to the SMT Ml989, but fitted with the turbine engine and 1 st generation ERA. This is probably the T-80U.

T-80D - Soviet documents refer to a T-80D. Nothing definite is known of this variant though it may refer either to an initial diesel powered version of the T-80, or a T-80 equivalent of the T-55AD Drozh anti-missile air defense vehicle.

T-80U/T-80UD - This is the latest version of the T-80 family, sometimes called the SMT M1989. This version has two significant changes from the earlier T-80 family, including a new turret with on improved frontal armor package with 2nd generation reactive armor. This variant is equipped with the 9K120 Svir laser guided antitank missile in place of the older Kobra. The standard version is fitted with the 6TD diesel engine, a 6-cylinder derivative of the 5TDF engine found in the T-64 family, There have been reports that a version of this tank exists with the older gas-turbine engine, but equipped with the modified turret and 2nd generation reactive armor. In the photos here, this version is referred to as the T-80UD.