Circa 1936-1951 The deep plate is fully glazed and marked under the glaze with the “GENUINE fiesta HLCo USA” stamp. Deep plates would have been placed by hand into the kilns and set on sagger stilts under the rim, leaving the three marks underneath where they sat touching the glaze. Measures 8 1/2” wide from brim to brim and 1 1/2” tall.