Tiger I nickname "Tiger" by Ferdinand Porsche, and the Roman numeral was added after the later Tiger II entered production. The initial designation was "Panzerkampfwagen VI Ausführung H" (‘‘"Panzer VI version H"’’, abbreviated "PzKpfw VI Ausf. H") where 'H' denoted Henschel as the designer/manufacturer. It was classified with ordnance inventory designation "SdKfz 182". The tank was later re-designated as "PzKpfw VI Ausf. E" in March 1943, with ordnance inventory designation "SdKfz 181". Today, only seven Tiger I tanks survive in museums and private collections worldwide. The Tiger 131 at the UK's Tank Museum, which was captured during the North Africa Campaign, is
3rd SS Panzer Division Totenkopf fighting alongside the 5th SS Panzer Division "Wiking" and the "Hermann Göring" Panzer Division destroyed the Soviet 3rd Tank Corps. The terrain around Modlin is excellent for armour, and "Totenkopf's" panzers exploited this to their advantage, engaging Soviet tanks from a range where the superiority of the German optics and the 75 mm high-velocity gun gave the Panthers an edge over the T-34s. The efforts of the "Totenkopf", "Wiking" and "Hermann Göring" divisions allowed the Germans to hold the Vistula line and establish Army Group Vistula. In December 1944, the IX SS Mountain Corps (Alpine Corps-Croatia) was encircled in Budapest.