The electric multiple unit Sm1 is the oldest type of commuter train equipment still in active use by the VR Group (Finnish Railways). Fifty Sm1 units were built between years 1968 and 1973 at Valmet airplane factory in Tampere. It was put into use on the first electrified Finnish railway line between Helsinki and Kirkkonummi on January 26, 1969 with five units in operation. Nowadays all Sm1 units have been thoroughly renovated and they bear the red-and-white VR livery introduced in the 1990s.