Antique China Porcelain Tray or Plate, stamped D.R.P. Brevete SGDG RW, dated Dec 1724 - as pictured. Measures about 14-1/2in wide x 17in long.
Breveté SGDG was a French type of patent that ceased to exist in 1968. The name was a common abbreviation for "Breveté Sans Garantie Du Gouvernement“ (patent without government guarantees). I was unable to identify the other stamped items, nor read the top mark.