A colored postcard portraying an artist's rendering of a Hoover (Boulder) Dam interior. Printed on the top border of the card: "Entrance to one of the four 56 foot diversion tunnels, Boulder Dam Project." Handwritten text on back of card.
Irving Kirshbaum (1909-1980) worked for Willie Alderman and Dave Berman at the Riviera Hotel and Casino in Las Vegas, Nevada from 1955 until the 1970s. Kirshbaum was born in Minneapolis, Minnesota and lived in Los Angeles, California before he moved to Las Vegas in 1955. He worked as a "box man and a floor man" at the Riviera.