 Derfflinger was constructed at <unk> & <unk> in Hamburg under construction number 213 . She was the least expensive of the three ships , at a cost of 56 million gold marks . The ship was ready to be launched on 14 June 1913 , but during the ceremony , one of the wooden <unk> upon which the hull rested became jammed . It took until 12 July for her to enter the water . She was commissioned into the High Seas Fleet on 1 September 1914 , shortly after the outbreak of World War I. Lützow was built at the <unk> dockyard in Danzig under construction number <unk> , at the cost of 58 million gold marks . The ship was launched on 29 November 1913 , and after lengthy trials , commissioned on 8 August 1915 . Hindenburg , the final member of the class , was built at the Imperial Dockyard in Wilhelmshaven , under construction number 34 . The ship was built at a cost of 59 million gold marks , the most expensive of the three vessels . She was launched on 1 August 1915 and commissioned on 10 May 1917 . 
