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In page Valmet Nr I:

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For the Nr I type trams, HKL decided to adopt a new livery. Instead of the traditional green/yellow colours, the new trams were painted light grey, with an orange stripes running along the top and bottom of the carriage.[1][2] In 1986 HKL decided to abandon the unpopular orange/grey livery, and by 1995 all trams of this type were painted in the green/yellow colours, with the top half of the tram painted yellow and the bottom half green.[1][3][4]