This is a coin ring made from .925 sterling silver (Ag) plated with white gold.  Mounted on the ring is a 1/10 oz troy platinum Britannia coin made by the British Royal Mint.  It is newly made.  The ring size is adjustable.  The photographs show the exact item for sale.  It comes with the red box.  There may be very minor marks on the ring metal visible upon close inspection.  The coin itself has a mark on it; see the pictures.