Union Pacific Lucky Piece struck in 1934 by the Aluminum Co of America. Souvenir medal. Diameter: 1 1/4" (3.2 cm). Inscription at lower center on reverse - GREENDUCK (illegible) Obverse shows image of approaching streamlined train with inscription at center "Lucky Piece". Reverse bears a shield-like logo of the Aluminum Company of America with inscription: " A sample of the sluminum in the new Union Pacific train built by Pullman Car & MFG Corp