William IV Mahogany Revolving Piano Stool. 19th Century This Rather Elegant Piano Stool Stands upon Turned and Shaped Front Legs with Sabre Back Legs. The Recently Reupholstered Seat Rises and Falls by way of a Wooden Screw Mechanism. The Back of the Stool Having Lyre Shaped Supports and Brass Rods. The Top Rail Having Typical William IV Carved Tulips. Size: Height 33 1/2” (85cm) Width 14” (36cm) Depth 12” (31cm)