マッターホルン・ゴッタルド鉄道
The Brig-Visp-Zermatt-Bahn Deh 4/4, now known as the Matterhorn Gotthard Bahn Deh 4/4 21–24, is a four member class of metre gauge, rack rail, electric multiple unit power cars operated until 2002 by the Brig-Visp-Zermatt-Bahn (BVZ), and since then by its successor, the Matterhorn Gotthard Bahn (MGB), in the Canton of Valais, Switzerland.