According to VDK´s site
www.volksbund.de Anton Gassner is buried in Prešov, some 30 km north of Košice (block 3, row 5, grave 108). The same source states that he was born at Gaden-Pfaffenhofen on 6. 2. 1920. Also, according to JaPo´s Messerschmitt Bf 109s of JG 52 in Deutsch Brod, Gassner was member of 1./JG 52, not 6./JG 52 (JaPo´s info seems to be correct as he is not listed in the loss list of Barbas´history of II./JG 52). Last but not least, his aircraft was of course Bf 109G-14, not G-4.