Antique cast iron heat register. This floor vent is signed W.O. Creamer, NY, and marked with a patent date of Sept. 14, 1869. The back opening of this floor grate is 8″ x 12″, and the grate measures 9 7/8″ x 13 5/8″ overall. Please note that these are antique heat registers and may vary in color or finish from the one pictured.