The Hugarian 40M Turan I was based on the Czech Skoda T-21 prototype and was produced in two variants - the 40M (Turan I) was armed with a 40mm gun and the 41M (Turan II) was armed with a 75mm gun. Turan I served on the Eastern front around Stalingrad in service with the 1st and 2nd Hungarian Armoured Divisions. Later versions were upgraded to carry a 75mm main gun better suited to take on the Russian armour. Between 1941 and 1943, 285 Turan I were produced.