Schematic drawing of Nos. 89 to 92 from the SLM
SLM 
When the 2-6-0 wheel arrangement was not yet widespread in Europe, the Gotthard Railway had eight tank locomotives with this wheel arrangement built in Esslingen. They were to be used to pull passenger and express trains on the mountain route and also to pull freight trains in the lowlands. Four more followed in 1883 from the SLM. These differed from the first eight by the coal bunker, which was behind the cab. Upon the nationalization in 1909, all came to the SBB. They were retired between 1914 and 1933. 