I just called Denis Chardon at our after sales service to ask the question as it was unclear for me too (even though I do speak French!). This display was actually set up specially for the collectors visit as they wanted to show in one window the type of watches, chronographs, stop watches and movements that they can atke care of. The watches have been selected from the Museum collection (from the archives). The display is such a great addition to the service that it will be kept there (another improvement at TAG Heuer thanks to the collectors summit). The idea of mounting such a display was to be able to show you timepieces that you could touch without pulling out client's watches waiting for repair. The ones that were waiting for repair are either in small velvet green boxes or being worked on, or being tested for accuracy.
I hope this answers the question.