The first photos illustrate one of a pair of console table brackets (forged mild steel) based on ones in an 18th c. Virginia home. These were mounted to a wall in the entrance hall of a high style house and held a polished marble top. They were pretty common in England, based on the numbers that are held by the Victoria and Albert museum, but only a handful survive in America that I am aware of. Alston Deas illustrates one from Charleston, SC and I think there is another pair in museum storage at Williamsburg.
My principle line of work is recreations of historical ironwork: domestic untensils, building hardware, tradesmen's tools etc. done in an 18th c. or early 19th c. style. I was a time served apprentice at Colonial Williamsburg and received my journeyman's certificate in 1995.
Copy and photos supplied by Jay T. Close.