In February 1936, Dr. Ferdinand Porsche presented his first prototype of the "People's Car", which was to be the base of the Volkswagen "Beetle". However, with the outbreak of WWII, all manufacture of the Volkswagen was immediately turned to military production. In January 1938, German Defense Forces presented specifications for a military version of this practical vehicle. In November of that same year, a prototype was completed and it was officially designated Pkw. K1 "Kübelwagen" Type 82. The vehicle used a light but sturdy monocoque construction with foldable canvas top. With its reliable engine and heavy duty suspension, the Kübelwagen immediately came to be used by every unit, from the scorching desert of Africa to the frozen Russian Eastern Front. About 51,000 Kübelwagens, including several variations, rolled out from the factory by the end of WW2.