A Sessions Clock Company synchronous motor is in the base. A worm gear from the motor drives several other gears that turn a wide shaft with an eccentrically mounted wheel. The wheel can be seen near the top of the picture. This wheel is positioned in a U shaped bracket attached to the plastic that is between the front and back glass. The side to side motion is caused by the eccentric wheel.
Radial lines are at the other hours.
There is no light. Power requirement is A.C., 110V 60 cycle, 2.5 watts. Weight is 3.6 lbs. Starlight Model number 146. There is a light in the base that illuminates the etched patterns on the glass as well as the edges.