Stridsvagn m/21 (Strv m/21) was a Swedish development on the German World War 1 tank the LK.II
It was powered by a sleeve valve type engine located in the front, the driver and crew been in the rear. The suspension and running gear was protected by armored skirts. Ten of these tanks where build and where armed with a 6.5mm machine gun
The Strv m/21-29 was an upgraded version of the m/21. The modifications included a more powerful engine and heavier armor.