Antique ironstone china soap dish, with nice old stamped marking on the reverse. Greenwood China - Trenton New Jersey.
This is plain and simple, undecorated white china which would look equally at home in the kitchen or bathroom - a classic, timeless piece.
It's about 5 3/4" long over the rim, shown holding a soap 2 1/4" square. (Soap not included.) There's light wear and scratching to the finish from use, but no chips, cracks or serious staining.