Plastic Kit Trumpeter Sweden Strv 103C MBTThe S tank was developed in the later 1950s by Bofors for the Swedish Army and a total of 300 were delivered to the Swedish Army between 1966 and 1971. Labelled by some as a tank killer rather than a main battle tank, the S tank is noted for its unusual design, being perhaps the first turretless tank in the world. Since its entry into service with the Swedish Army the S tank has many improvements including the replacement of the Rolls Royce K60 engine