This vintage advertising clock was made for Rex Automatic Storage Water Heaters. It has a bright yellow, red and white plastic face with black hands and numbers. The back is solid white and has an attached wire hanger and also a hole for hanging. The clock uses two 15 watt bulbs to light up the face. It has a Synchron motor. The back is removable for changing the bulbs or re-setting the time. The clock was made by Neon Products Inc. of Lima, Ohio.
The clock is 16 inches in diameter. It runs quietly and keeps accurate time. The cord and plug appear to be original.