This unusual Art Deco looking clock is called a Golden Hour clock and was made by the Jefferson Electric company from the 1930’s-80’s. These clocks were marketed as Mystery Clocks because they have no visible workings. Essentially, they are powered by an electric motor in the base; the minute hand uses friction to move on the crystal face and the hour hand has a weight behind it. The rim and dial were once painted with radioactive paint so that they would glow in the dark although ours doesn’t. I love the design as it is both elegant and retro-looking. My clock dates from the 1950’s and keeps very good time although we have had it repaired once. It was in my mother-in-law’s living room for 40 years and is now in ours.
There are also a few funny print ads for the clock that show people looking at each other through the clock. The clock was sold in the $20 range in the 50’s but is now worth a bit more because of the interest in mid-century modern design.