Antique DEP marble Art Deco 1930's French mantle clock.

This is a nice Art Deco 20's-40's mantle/alarm clock. It is made by Dep of France, and I have heard of this maker and their clocks, but I am still rather unfamiliar with it. The clock is in very good working order. The double, or two tone casing is in perfect condition also. Once again, any help or information would be really great on this as some Dep clocks are common. Thanks for looking at this cool and rare piece! Thanks!