It is a wind-up clock, with no alarm, housed in a chrome-plated brass case, with a mirrored face.  It is a small clock, measuring about 4 inches square.  The numerals were engraved on the front surface, and paint-filled.  The unique deco style of the numerals was a signature of Majestic clocks.  There was no relation to the radio company of the same name, however. 

The example shown uses a copper-colored shade of glass that is generally called "peach".  There also was a version using blue glass.