[locomotive] Bulgaria, battery and hydrogen? Müller Am 841 shunter update

Written by on in Müller Technologie, Müller Technologie Am 841 tri-mode project

In 2021, Railcolor News wrote about Müller Technologie buying surplus Am 841 diesel locomotives from the Swiss federal railways SBB. We go back to Switzerland to sum up the latest technical developments and fleet changes:

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