On Al's business card is written: "Andre Millar, Objects d'arte". The correct French spelling is "Objets d'art". According to Wikipedia, the term is used in English "to describe works of art that are not paintings, large or medium-sized sculptures, prints or drawings".
The deposit boxes in the vault are opened by entering a 3-digit-combination. But there are only 3 figures to enter the combination. It seems that every figure may be used only once, which would allow only 6 different combinations. Even multiple use of the figures would allow only 27 different combinations, which would never do. There are far more boxes in the vault.