 Kọ itẹsiwaju fun paragirafi yii - Esser tun gba awọn ami ẹyẹ meje ni ICF Canoe Sprint World Championships pẹlu wura meji K-2 500 m: 1963, 1970, fadaka mẹrin K-1 500 m: 1966, K-4 500 m: 1963, 1966, 1971 : , ati idẹ K-4 500 m: 1970. 