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
103rd SS Heavy Panzer Battalion four more in August. On 20 October, all ten Tigers were given to the training unit and the 103rd was outfitted with the Tiger II before being ordered to the Eastern Front, as part of the III (Germanic) SS Panzer Corps. On 14 November 1944 the unit was redesignated 503rd Heavy SS Panzer Battalion. It had a total of 39 (instead of the full complement of 45) Tiger IIs and was loaded onto trains on 27 January 1945, and sent to the Eastern Front in the Army Group Vistula sector. By 15 April 1945, the 503rd reported a total of