DB Class 403 may refer to:
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DB Class 403 (1973)
The DB Class 403 was a series of three electric multiple units commissioned by the Deutsche Bundesbahn in the 1970s, an early predecessor of the Intercity-Express as a high-speed train. The units were mainly used for InterCity services and agai ...
, a train class in Germany (1973-1993)
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DB Class 403 or ICE 3, a high speed train class in Germany (since 1999)
{{Disambiguation