Here is the finished build of Bertrab's Albatros D.III.
On 6 April 1917, the United States entered the war. It was also the day that Ltn. von Bertrab of Jasta 30, flying his dark purple Albatros D.III with its unique comet insignia, shot down four British aircraft in three hours. His fifth and final victory was achieved a month later. The war ended for Bertrab on 12 August 1917. While attacking a balloon, his Albatros D.V was shot down by a Nieuport piloted by Edward Mannock. Bertrab survived but was captured.
6 April 1917 Ltn. von Bertrab victory over Sopwith 1-1/2 #A.1093, 45 Sqn. RFC, 10.30 Obigies. The crew were 2/Lt. J.A. Marshall, KIA & 2/Lt. F.G. Truscott,KIA.