This tank established the operational basis for the development of the modern MBT. The production history of each version of Tank III and the correspondence of the subject model photographed this time are as follows. Type A May 1937- Short-barreled 46.5 caliber 3.7cm gun prototype Type B October 1937 - Short-barreled 46.5 caliber 3.7cm gun, improved undercarriage Type C - Short-barreled 46.5 caliber 3.7cm cannon, improved undercarriage Type D January 1938 - Short-barreled 46.5 caliber 3.7cm cannon, improved undercarriage Type E December 1938 - Short-barreled 46.5 caliber 3.7cm cannon, torsion bar suspension Type F September 1939 - Short-barreled 42 caliber 5cm cannon, reinforced armament and armor Type G April 1940 - Short-barreled 42 caliber 5cm cannon, Tropical spec Type H October 1941 - Short-barreled 42 caliber 5cm gun, widened track Type J December 1941 - Short-barreled, 42 bore, 5cm gun, new body design Type L (Late J) - Long-barreled 60 caliber 5cm gun, increased armor ...Subject front row center/HengLong 1/16 modification (African front tropical spec) Type M October 1942 - Long-barreled 60 caliber 5cm gun, wading function Type N June 1942 - Short-barrel 24 caliber 7.5cm cannon, Type J/L/M conversion to firepower support tank ...Subject front right/HengLong 1/16 modification (Northern Italian Front spec) The subject model of the Type Ⅲ derived type photographed this time. Ⅲ Type H Submarine tank ...Subject front left/HengLong 1/16 (river wading spec) Ⅲ assault gun ...Subject back right / HengLong 1/16 Ⅲ recovery tank ...Subject back left/HengLong 1/16 custom modification (Vinterkötten track spec)