Black and white image of "Big Bertha," the Six Companies, Inc. motor transport used to haul workmen between Boulder City and Hoover Dam. This double-decker truck could haul 154 men. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

The view of postcards that can be bought from anywhere between the range five cents to twenty five cents in Boulder City, Nevada. Transcribed onto the upper left postcard: "Dear Billy, Just a giant postcard from Boulder Dam, and a picture of Old Glory to hang in your room. Regards, Tommy. Master Billy Brown, Orangedale, California." Transcribed onto the upper left postcard with an American flag on it: "Old Glory." Transcribed onto the bottom third postcard: "Dear Folks, It takes a GIANT postcard to describe this stupendous, colossal, amazing, beautiful, and gigantic engineering feat - Boulder Dam! Love Jane. The Folks Back Home, U.S.A."