The following are ads that feature the Hoover (Boulder) Dam. Hope there is something here that you can use. Life 1951, Calvert Reserve Whiskey ad. 11x14 in color, great picture of the dam. Caption reads, "World's biggest power plant-Hoover (Boulder) Dam Challenges Comparison with any work of man." $12 Fortune 2-36, 11x14 color ad for Westinghouse. Drawing of two of the massive cylinders. There is a nice description of the Dam. Nice ad. $15. Fortune 12-40, 11x14. Color picture of the dam in the background and a picture of an electrical tower in front of the dam. $17 Chrysler Owners' Magazine June 1952. 8x11 magazine. On the cover is a water-level view of the Dam looking upward. $18. Fortune 9-36, 11x14. Ad for Westinghouse. Color picture of a power transformer that stands at the receiving end of the Boulder Dam. Ad has a nice article that describes the power transformers. $14 info@millionmagazines.com