Complex sentence: On 2 June 1957 the "Paris-Ruhr" was one of the initial TEE-services, the rolling stock got a TEE-signage on front but the use of VT 08 continued because the German TEE DMUs were not available in time.
Split into simpler sentences: On 2 June 1957, the "Paris-Ruhr" was one of the initial Trans Europ Express (TEE) services. The rolling stock was given TEE signage on front but the use of VT 08 continued because the German TEE trainsets planned for it were not available in time.