In 1921, Vickers-Armstrong developed a project for the Vickers Light Tank. The 1923–1924 trials showed that the tank was ready for mass production. In 1924, the vehicle was renamed the Vickers Medium Tank Mk. I. The same year, a total of 30 vehicles were produced and entered service. Another 50 vehicles of the Mk. IA modification were manufactured later. The Vickers Medium Tank remained in service until 1938.
Time for the successive autoreloading of each shell into the magazine.
Characteristics are specified for Siege mode.
Characteristics are specified for Rapid mode.
Reload time of the first and second guns on double-barreled vehicles.
Characteristics are specified for vehicles with crews trained to 100%.