Back side of the back wall is marked with a number "20". There is an insert in the bottom that tips out the ashes and remains of the previous fire- it's not the original but it works just fine. There is a vertical split on the base of the back panel but it is not very noticeable and certainly doesn't affect the integrity of the grate.
I was watching a Downton Abbey episode and spied a very similar grate in Lord Grantham's dressing room. The item "ANTIQUE VICTORIAN CAST IRON COAL LOG FIREPLACE INSERT FIRE BOX GRATE FLEUR-D-LIS" is in sale since Monday, January 08, 2018.
This item is in the category "Antiques\Home & Hearth\Hearth Ware". The seller is "totherafters" and is located in Macon, Georgia. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Sweden, Indonesia, Taiwan, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Russian federation, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Ukraine, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica.