By 1971,
CIWL rolling stock becomes aged and outdated and the renovation and replacement needed is beyond the company's available financial ressources. Thus they give up operating their own coaches (although they continue to provide the staff and other services like laundry) and these are sold or rented to national railway companies in France, Italy, Switzerland, Western Germany, Austria, Belgium, the Netherlands, Denmark and Spain. At the same time, an international sleeping car pool named TEN (Trans Euro Night) is founded and it takes over and manages many of the sleeping cars.
The 80x units from this series are divided as follows:
- units 4501 - 4520 are transferred to
National Network of Spanish Railways - Renfe where they continue to be registered as
WL P 4501 - 4520;
- units 4521 - 4551 and 4567 - 4574 are transferred to the
French National Railway Company - SNCF where they are registered
WL P 75-41 711 - 749;
- units 4552 - 4566 are transferred to the
Italian State Railways - FS where they are registered
WL P 75-41 750 - 764;
- units 4575 - 4580 are transferred to the
French National Railway Company - SNCF to be used for the TEN pool parc and are registered
WL P 75-40 701 - 706.