Soviet/Russian T-54 Series

References:

Jane's
T-54 and T-55 Main Battle Tank: 1944-2004 by Stephen J. Zaloga; Osprey New Vanguard 102
Tank-Net Discussion Forums

Note: Object is Объект in Russian if you want to Google the net for more designs. Be sure to have the latest internet explorer, a decent antivirus program, firewall, and god knows what else; since the Russian corner of the internet is full of viruses, et al.

Object 137-1 (T-54 obr. 1946)

Designer: Nizhni Tagil
Acceptance:
April 1946
Production:
1947-1949
Cost: 326,000 1947 Rubles
Crew: 4
Length: 9000mm
Width: 3,270mm
Height 2,400mm
Main Gun: 100mm Rifled Gun D-10T (34 rounds)
Coaxial: 7.62mm SG-43 (3,500 rounds total of all 7.62mm)
Auxiliary: 2 x 7.62mm SG-43s in fixed boxes on fenders
AAMG: 12.7mm DShK (200 rounds)
Sight: TSh-20
Engine: B-54 (520 hp)
Frontal Glacis Armor: 120mm at 60 degrees.

Object 137-2 (T-54 obr. 1949)

Production: 1949-1951
Gun: 100mm Rifled Gun D-10T
Sight: TSh2-22
Auxiliary:
1 x Bow MG fixed in Glacis, and fired by driver.
Frontal Glacis Armor: 100mm at 60 degrees.
Notes: Different turret shape introduced. Glacis Armor reduced due to overloading of front roadwheels.

Object 137-3 (T-54 obr. 1951)

Production: 1952-1954
Length: 9000mm
Width: 3,270mm
Height 2,750mm
Ground Clearance:
425mm
Main Gun: 100mm Rifled Gun D-10T (34 rounds)
Coaxial: 7.62mm SGMT (3,500 rounds total of all 7.62mm)
Bow: 7.62mm SGMT fixed in Glacis, and fired by driver.
AAMG: 12.7mm (200 rounds)
Engine: V-54 (520 hp at 2,000 rpm)
Sight: TSh2-22
Track Width:
580mm

Object 481 (OT-54)

Acceptance: 1954
Main Gun: 100mm (19 rounds)
Coaxial: ATO-1 Flamethrower (460 to 470 liters of fuel giving 20 shots)
(OT-54 Side Perspective View)

Object 483 (T-54B based Flamethrower)

Main Gun: OM-250 Flamegun
Notes: Flamethrower installed in place of main gun. Not proceeded with.
(Object 483 Photograph)

Object 137K / 137К (T-54K / Т-54К)

Notes: Command version of T-54 M1951. Additional R-112 radio fitted, along with an Auxiliary Power Unit. Glacis MG removed.

Object 137G / 137Г (T-54A / Т-54А)

Production: 1955-1956
Gun: 100mm Rifled Gun D-10TG
Stabilizer: STP-1 “Gorisont” (“Horizon”) (Vertical Plane)
Cruising Range: 330 km
Notes: Early models modernized to this standard have counterweight instead of fume extractor.

Object 137GK (T-54AK / Т-54АК)

Gun: 100mm Rifled Gun D-10TG
Stabilizer: STP-1 “Gorisont” (“Horizon”) (Vertical Plane)
Cruising Range: 330 km
Notes: Command version of Object 137. Fitted with extra R-112 radio, along with Auxiliary Power Unit. Glacis MG removed.

Object 137G2 / 137Г2 (T-54B / Т-54Б)

Production: 1956-1959
Gun: 100mm Rifled Gun D-10T2S
Stabilizer: STP-2 “Tsyklon” (“Cyclone”) (Two-Plane)
Cruising Range: 430 km
Notes: Additional fuel added increasing cruising range, snorkel system fitted, along with a turret basket.

Object 137G2K (T-54BK / Т-54БК)

Gun: 100mm Rifled Gun D-10T2S
Stabilizer: STP-2 “Tsyklon” (“Cyclone”) (Two-Plane)
Cruising Range: 430 km
Notes: Command version of Object 137G2. Fitted with extra R-112 radio, along with Auxiliary Power Unit. Glacis MG removed.

Object 139 (T-54M)

Designer: Nizhni Tagil
Production: October 1954 (prototype)
Gun: 100mm Rifled Gun D-54T (43 Rounds)
Stabilizer: Raduga
Engine: V-54-6
Notes: Was accepted for service, but not produced.

Object 140

Gun: 100mm Rifled Gun D-54TS
Stabilizer: Molniya
Notes: Reconfiguration of Obj 139.

Object 137M (T-54M)

Gun: 100mm Rifled Gun D-10T2S (43 rounds)
Coaxial: 7.62mm PKT
Bow Gun: 7.62mm PKT (Fixed, aimed by driver)
Stabilizer: STP-2 “Ciklon-M” (Two-Plane)
Rangefinder: KDT-1 Laser Rangefinder.
Engine: V-55 (or V-55V)
Notes: Modernization program for T-54 Models 1946/49/51. Stabilized gunners' sight fitted, IR sights for Commander, Gunner, and Driver. Machine Guns changed to PKTs. PAZ Anti-Radiation equipment and Automatic Fire Extinguishers fitted.

Object 137MK (T-54MK)

Notes: Command version of Object 137M. Added an additional R-112 radio, a TNA-4 APU; and removed the bow machine gun.

Object 137GM (T-54AM)

Notes: Modernization program for Object 137G (T-54A).

Object 137GMK (T-54AMK)

Notes: Command version of Object 137GM.