The four films came in regular keep cases housed in a cardboard box. There is another French box set also collecting the first four films on DVD, presumably an earlier release.
1. Front of box
2. Back of box
3. Top of box
4. Bottom of box
5. DVD spines inside box
6. Front of first film
7. Back of first film
8. Front of second film
9. Back of second film
10. Front of third film
11. Back of third film
12. Front of fourth film
13. Back of fourth film
Thanks to eBay member narmada49 (images 1-13).