If you are an electrician, mechanic or a telegraph operator you belong in the U.S.

If you are an electrician, mechanic or a telegraph operator you belong in the U.S. Army Signal Corps If you are not we will train you, get in now. LOC Summary: U.S. Army Signal Corps recruiting poster showing three soldiers using various methods of communication and information gathering. Date Created/Published: Brooklyn, N.Y. : Latham Litho & Printing Co., between 1917 and 1920. World War One poster provided by LOC. Original medium: 1 print (poster) : lithograph, color.