▁never ▁used ▁on ▁the ▁adjacent ▁L öt sch berg bahn ▁( B ern - L öt sch berg - Sim pl on ▁railway ) ▁from ▁Th un ▁to ▁Brig . ▁The ▁locomot ive ▁was ▁not ▁based ▁in ▁Bern ▁for ▁long ; ▁its ▁service ▁there ▁was ▁followed ▁by ▁a ▁test ▁phase ▁on ▁various ▁lines ▁including ▁the ▁Got th ard bahn ▁( G ot th ard ▁railway ). ▁ ▁In ▁ 1 9 2 5 ▁the ▁locomot ive ▁was ▁assigned ▁to ▁the ▁Bas el ▁( Bas le ) ▁dep ot , ▁where ▁it ▁remained ▁until ▁its ▁withdraw al ▁from ▁service . ▁In ▁ 1 9 2 7 ▁its ▁ro ster ▁included ▁– ▁together ▁with ▁two ▁A e ▁ 4 / 7 s ▁– ▁two ▁fast ▁train ▁pairs ▁Bas le ▁– ▁Zürich ▁and ▁back ▁with ▁a ▁daily ▁run ▁of ▁. ▁ ▁With ▁its ▁performance ▁( about ▁ 9 0 % ▁of ▁that ▁of ▁the ▁A e ▁ 4 / 7 ), ▁the ▁locomot ive ▁was ▁univers ally ▁oper able . ▁The ▁maximum ▁speed ▁of ▁ ▁allowed ▁them ▁to ▁pull ▁fast ▁trains , ▁therefore ▁the ▁locomot ive ▁was ▁often ▁used ▁when ▁capacity ▁needed ▁to ▁be ▁double d . ▁In ▁this ▁role ▁the ▁locomot ive ▁led ▁fast ▁trains ▁to ▁Zürich , ▁Ch ur , ▁Lu z ern , ▁Ber ne ▁and ▁Sp iez . ▁ ▁O ften ▁the ▁A e ▁ 4 / 8 ▁worked ▁fre ight ▁trains ▁to ▁Zürich ▁and ▁Winter thur . ▁During ▁its ▁last ▁years ▁of ▁service ▁the ▁locomot ive ▁was ▁used ▁for ▁Bas el