The Swedish Stridsvagn 103 main battle tank

The Stridsvagn 103 (Strv 103), also known as the S-Tank, is a Swedish post-World War II main battle tank, designed and manufactured in Sweden. It was developed in the 1950s and was the first main battle tank to use a turbine engine and the only mass-produced tank since World War II to dispense with a turret.

It has an unconventional design with a unique gun laying process: it is turretless with a fixed gun traversed by engaging the tracks (like the 75mm gun on the 1930s French Char B1) and elevated by adjusting the hull suspension. The result was a very low-profile design with an emphasis on survivability and heightened crew protection level.

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