The Be 4/7 were built in 1921 in a number of 6 locomotives by SAAS Genève and SLM Winterthur. Their field of application was the Gotthard, where they were, since 1923, dispatched from Erstfeld.
From 1966 on 5 locomotives were gradually decommissioned. Only the 12504 was preserved as a historic vehicle virtually unchanged. The annual km performance was between 112'000-132'000km
Curriculum Vitae locomotive 12504:
Take over on 23.02.1922 at the Depot Bern
- Mai 1923 Depot Erstfeld
- 1927 Depot Bellinzona
- 1932 Depot Bern
- 1966 Depot Biel
- Summer 1966 substation for 220V at Burgdorf,
- Summer 1969 substation for 220 V at Etzwilen
- 1976 Preparation as historic locomotive, since 1977
- 2005 Care by Team Olten