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The first articulated trams were placed in service on line 10 in 1973. They were supplied by Valmet. The grey and orange colour scheme was not popular among the public. In 1986-1995 articulated trams were repainted in traditional yellow and green.

A wire insulator is a small but important object for tram safety. Trams take electricity from overhead lines carrying 600 volt current. Insulators prevent electricity from reaching supporting wires.

Work behind the scenes. Electrical department at the Töölö tram repair shop in 1970.