In 1940 the Hungarian Ministry of De fence to obtain Czechoslovakian tanks, but the production from Skoda and CKD/Praga were committed to building tanks for the Germans.2 They did obtain the production rights to the Czechoslovakian designs for the S-IIr, S-IIa, T-21.2
The S-IIr prototype was completed in August 1941. Production for the Turan 1 started in October 1941.
They were built by the Weiss & Cspel Steelworks of Budapest.
A long barrel 75 mm gun was installed. It was only in the prototype stage when the Germans occupied Hungary. It was to be called the Turan 3.
The 2 man turrets were replaced by 3 man turrets and radios. The Hungarian made 8-cylinder engine was installed. This became the 40M Turan I.
Turan 1, Turan I: 300
Weiss Manfréd (Cspel): 70
Magyar Waggongyár (Gyõr): 70
Mávag (Diósgyõr): 50
Ganz (Budapest): 45
Turan 2, Turan II: 322
Turan 1, Turan I: Had 40 mm gun. Late production models had 61 mm in the front.
Turan 2, Turan II: Had a modified turret with a long bevel on the cupola and the armament was changed to a short caliber 75 mm.