The day train, "Senator" (VT 10 501), consisted of seven cars, including the front and rear engine unit.

The night train, "Komet" (VT 10 551), was different from the "Senator" though its shape looked similar at first sight.

"Komet" was in service between Zürich and Hamburg from May 1954 until December 1960 and was operated by the DSG (Deutsche Schlafwagen Gesellschaft/German sleeping car company).

Each power car was equipped with two MAN diesel engines of Type D 1548 G, each developing 118 kW (158 hp).

To supply power to the train, two additional diesel engines were installed, each capable of 92 kW (123 hp).