c. 1900's fully functional american antique interior residential ornamental cast iron floorboard register or grate fabricated by or for the hess warming and ventilating company, chicago, il. the grate contains a detachable panel featuring a repeating fish scale pattern. the ornamental surround mounts flush against the wall. the single sheet steel louver pivots with ease. contains a mostly uniform black enameled finish. measures approximately 14 3/4 x 11 inches.