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Other examples include New Zealand's DJ, EW and EF classes; the Eurotunnel Class 9 locomotives, which were themselves derived from the New Zealand EF class; the Swiss SBB Re 6/6 (Re 620); the Russia Railways EP10, and the South Korean Korail Class 8000.
For electric locomotives the second letter often referred to where the locomotive was based, such as EC in Christchurch, EO in Otira and EW in Wellington.