The smooth case rests on a wide base. The upper part—the "dome"—has fretworked sides through which one can see the chime and alarm bells. The silver dial holds a rotating disk at the center for the alarm. On the back are small dials for controlling the chimes. The lantern-shaped iron movement has three trains: the going train with a five-coil gut fusee and a verge escapement, and two separate chime trains for the hours and quarter-hours.