Medal commemorating the dredging and installation of lighted buoys on the rivers La Plata, Parana and Uruguay. Obverse: A female figure standing on a buoy lighting its beacon and pointing with her left hand to a dredger and lighthouse, a ship (right). Legend: 'DRAGADO Y VALIZAMIENTO LUMINOSO.' Inscription: 'RIOS: DE LA PLATA PARANÁ URAGUAY. 3 OCTUBRE 1904.' (The dredging and installation of lighted buoys on the rivers La Plata, Parana and Uruguay.) Reverse: A tablet of scroll form, inscribed; a laurel wreath tied with ribbon below. Legend: 'REPÚBLICA ARGENTINA.' Inscription: 'MINISERIO DE OBRAS PÚBLICAS PRESIDENTE TTE GRAL JULIO A . ROCA MINISTRO EMILIO CIVIT 3 OCTUBRE 1904.' (Inscription gives the names of the President and Minister of Public Works.)