Topdrawings Sd.Kfz. 121 Panzer II. All Versions Luchs, Book 7039, (Paperback)

In July of 1934, the Waffenamt (Ordnance Department) ordered the development of an armored vehicle 10 tons in weight and armed with 20mm automatic cannon. In early 1935, number of manufacturers including Krupp AG, MAN (chassis only), Henschel und Sohn AG (chassis only) and Daimler-Benz AG provided their prototypes of Landwirtschaftlicher Schlepper 100 (LaS 100) - agricultural tractor, for evaluation by the army. The new vehicle was also known as 2 cm MG Panzerwagen and as VK 622 (Versuchkraftfahrzeug 622). New light tank - Panzerkampfwagen II was to supplement new Panzerkampfwagen I light tank as a vehicle with heavier armament capable of firing armor-piercing and high explosive rounds.