The Stormartillerivagn M/43 (Sav M/43) was a Swedish assault gun based on the Stridsvagn M/41 SII chassis - in turn a Swedish licence built Czech TNH medium tank. Initially the M/43 was armed with a 75mm gun bit this was later upgraded to a 105mm m/44 gun. The M/43 was produced in 1944 with 36 vehicles produced. These remained in service until 1973.