A Westerwald stoneware square flask or bottle and stopper, early 18th century, the four sides each

A Westerwald stoneware square flask or bottle and stopper, early 18th century, the four sides each decorated with a scrolling blue design, the rounded shoulders with a grey trefoil motif, the stopper with a screw fitting, chipping to the edge of the stopper, 20.3cm. (2)