The BR 01 locomotive, built for the Deutsche Reichsbahn-Gesellschaft between 1926 and 1938, was the first standardised express passenger steam locomotive (Einheitsdampflokomotive).
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https://video.nostr.build/e171d660f099aca6fc67b85146e6c5ba304707d8ccad3f62f08eb6c23e9eeea1.mp4