Victorian rosewood and walnut adjustable piano stool

Wonderful 19th century rosewood & walnut height adjustable piano stool or dressing table stool with a vintage green material cushion top.
Very sophisticated iron and brass mechanism to adjust the height by turning the wooded knobs either end of the cushion top, with patent stamps by Marsden.
Very well turned legs with further ring turns and a swept foot.
Very stable and secure, comfortable to sit on too!
Measuring:
21 3/4 inches or 55 cm maximum height
17 3/4 inches or 45 cm wide
14 inches or 35.5 cm deep