Keith Murray Wedgwood Bowl in Black Basalt.
 
This 3813 shape bowl is 4 inches  tall and 6.5 inches in diameter and is in excellent condition and, importantly with bowls like this, there is no water damage or oxidization to the glaze on the inside of the bowl.
 
However, there is a minute slither off the underside of footrim (3-4mm) which keeps it from being perfect so I've priced it accordingly.