fully functional early 20th century antique american ornamental cast iron interior residential baseboard register or grate likely designed and fabricated by or for the hess warming & ventilating co., chicago, il. the upright grate contains a single intact pivoting louver with sliding wheel lever. contains a mostly uniform black enameled finish. the register contains a diamond pattern grille accentuated with foliated scrollwork. measures 14 x 11 inches.