Medal commemorating the Inauguration of the opening of St Nicolas, Rio de la Plata, 1904. Obverse: Mercury, seated on a rock, a sheaf of wheat at his feet, stretching his caduceus over the bow of a vessel marked 'PORVENIR'; distant coastline and setting sun. Legend: 'INAUGURACION DE LAS OBRAS DEL PUERTO DE SAN NICOLAS 17 DE JULIO DE 1904.' (The inauguration of the opening of the port of St Rio de Plata.) Reverse: Inscription, 'PRESIDENTE DE LA REPÚBLICA TTE GRAL JULIO A . ROCA MINISTRO DE OBRAS PÚBLICAS EMILIO CIVIT GOBERNADOR DE LA PROVINCIA MARCELINO UGARTE.' (Inscription giving a list of officials). Legend: 'SOCIEDAD ANÓNIMA "PUERTO SAN NICOLAS" COMPAÑIA DE OBRAS PÚBLICAS DEL RIO DE LA PLATA LD.' (Port St Nicholas Society below, association for the public opening of Rio de la Plata.)