Stridsvagn S (S-Tank) Main Battle Tank

The S-Tank was a turret-less tank proposal by Sven Berge. The vehicle would elevate and depress three gun with its suspension and had good sloped armor providing better protection for lower weight.
Variants:
1.
Name: Stridsvagn S (S-Tank 1959)
Type: Main Battle Tank
Origin: Sweden
Year: 1959
Produced: None

Length: 5.7 Meters
Width: 3.3 Meters
Height: 1.7 Meters
Weight: ~30000 Kilograms
Speed: ???

Crew: 3

Primary Armament:
-84 mm 20-Pounder (Autoloader) OR
-105 mm L7 (Autoloader: 25/20/5-Smoke) OR
-105 mm Gun (Autoloader)
Secondary Armament:
-???

Gun Flexibility: ???°

Armor:
-Hull
30 mm Front
30 mm Side
30 mm Rear
20 mm Top (20 mm Cupola)
20 mm Bottom

2.
Name:Stridsvagn S (S-Tank 1960)
Type: Main Battle Tank
Origin: Sweden
Year: 1960
Produced: None

Length: 6.6 Meters
Width: 3.4 Meters
Height: ???
Weight: 29937 Kilograms
Speed: 60 km/h

Crew: 3

Primary Armament:
-84 mm 20-Pounder (Autoloader) OR
-105 mm L7 (Autoloader: 25/20/5-Smoke) OR
-105 mm Gun (Autoloader)
Secondary Armament:
-???

Gun Flexibility:
11° Ascension
11° Depression

Armor:
???

3.
Name: Stridsvagn S (S-Tank 1961)

Type: Main Battle Tank
Origin: Sweden
Year: 1961
Produced: None

Length: 6.7 Meters
Width: 1.85 Meters
Height:3.3 Meters
Weight: 30844 Kilograms
Speed: 60 km/h

Crew:

Primary Armament:
-84 mm 20-Pounder (Autoloader) OR
-105 mm L7 (Autoloader: 25/20/5-Smoke) OR
-105 mm Gun (Autoloader)
Secondary Armament:
-

Gun Flexibility:
11° Accession
 11° Depression

Armor:
-Hull
40 mm Front
30 mm Side
30 mm Rear
25 mm Top

Sources:

http://ftr.wot-news.com/2014/08/13/swedish-tanks-part-xvi-the-s-tank-1956-1961/