Signed Art deco clock. Silver plated bronze plates

A very hard to find and impressive green marble and silver plated bronze plates art deco clock.
Stunning quality.
Large size 52cm (20") width for the clock only. With side vases this is about 80cm ( 30")

The right plate is signed but I am not sure about the name "G. MAXANCE" that I can read. The last letters are hard to read.

French. Circa 1930.