It was a Westinghouse poster from the early 1940's that was part of a series of posters produced for the war effort. It was created in order to try to recruit women to join the work force.
"A poster is any piece of printed paper designed to be attached to a wall or vertical surface. Typically posters include both textual and graphic elements, although a poster may be either wholly...
Going onto Ebay or Craigslist is a good start.Also going to local flea markets, collectable stores and checking advertisements are other ways.There are also many online stores that sell autographed...