Vintage Silver Italian Compact

This is another of my Italian Silver compacts marked 800, this was also made in the 1940s.
The whole case has a brushed finish with a engraved floral pattern running around both sides of the borders. Looking from the side you will see that it is an unusual oval shape. The catch is a polished silver and clips over a Chrysophrase stone set in a bezel surround. When opened it has 2 compartments one with a mirror and the powder container, which still has the powder filter and puff. There a silver catch at the top of the mirror which when open reveals a second compartment, does anybody have any idea what this was used for, the only thing I can think of is that it was used for visiting so cards. It is quiet a heavy compact.

Many thanks for looking