I号戦車
On 8 August 1937, Major General García Pallasar had received a note from Generalísimo Francisco Franco which expressed the need for a Panzer I armed with a 20 mm gun. Although originally forty Italian L3/35 tankettes were ordered with the original armament exchanged for the 20 mm Breda Model 35 instead, this order was subsequently cancelled after it was thought that the adaptation of the same gun to the German Panzer I would yield better results.