The locomotives were designed and assembled in Finland, either by Valmet Oy at Tampere (numbers 2801–2809) or by Transtech Oy at Otanmäki and Taivalkoski (numbers 2810–2823).
Die Lokomotiven wurden von Valmet Oy in Tampere (2801–2809) sowie von Transtech Oy in Otanmäki und Taivalkoski (2810–2823) gebaut.