This is a 1940 ad for a Caterpillar Diesel-Electric Sets! The size of the ad is approximately 3x11inches. The caption for this ad is 'Quiz: What should you do if electricity is costing you 2c or more per kilowatt hour and your bills are $30 or more a month?' The ad is in great condition. This vintage ad would look great framed and displayed! Add it to your collection today!