Antonius Graf von Korff killed in action on 29 March 1918 North of Jerusalem with the Asienkorps was serving as a Leutnant in the Garde-Jäger-Batallion, detached to Infanterie-Bataillon 701. Originally in the Garde-Schützen-Bataillon, on commissioning effective 3 January 1915, he was transferred to the Garde-Jäger-Bataillon.
Possibly the tunic was actually that of Leutnant d.R. Joseph Graf von Korff of the GSB, who was killed in action at Monte Tomba on 25 November 1917.
Regards
Glenn