I am not sure, but I think that these particular images may be from Serge Lutens time at Christian Dior — maybe they are early in his Shieido time. But probably about 30 or more years ago. There was no digital and retouching was done by specialist, usually using 11x14 inter-positives with dyes and air-brushes.
I remember because I was working as a photographer doing my own make-up at the time and Serge was a make-up artist doing his own photography.
I doubt very much that these would have been achieved with available light. Perhaps they were shot on large format — 10x8 even.
A white studio is, essentially, a huge soft box within which you place the talent and yourself. There is very skillful modelling of the facial contours which would suggest a multi-lamp set-up.
Serge is 71 years of age and a parfumier these days. Contacting him could be well nigh impossible.
Here is the link to his Wiki entry and there are details of books he did listed on the page. Back in the day, I used to have the Dior booklets that had page after page of his amazing work. Dior had joined with Kodak in research for pigments to use in the make-up which were as compatible as possible with the dyes used in the film emulsion to produce a film and photography range called Visiora. It was magnificent and I still have a four thousand dollar kit of the stuff.