Volvo M/1942 Tank ( original caption). Stridsvagn m/42 (Strv m/42) was the first Swedish tank to have a 75 mm gun. It was known as Lago II-III-IV by AB Landsverk. It first entered service with the Swedish army in November 1941 and was designated the Stridsvagn m/42. It was a fully modern tank for its time. It was armed with a 75 mm L/34 gun and four m/39 8mm machine guns. It was also well protected and mobile.