Columbia bicycles have been a major force in trends and bike technology for over 125 years in America. This is a fun clock for your rec room or anywhere. Limited Edition. Double Bubble clocks, made from the 1940's to the 1960's are well known for being the most attractive of all the advertising clocks. And each of clocks are beautiful. The clocks get their nickname, Double Bubble, because there is an inner crystal or glass bubble which displays the company logo. The hands of the clock are sandwiched between an outer crystal or glass bubble which usually displays the numbers of the clock. Limited production on many clock models is the rule, rather than the exception. Look for the clocks to become as collectible as the originals once we've sold out the run.Diameter: 14-1 2 Materials: Glass and metal Type: Wall Clocks Weight: 15lbs.