1930s "up and down" suspension

White porcelain and aluminum lift-and-lower mechanism. (pulleys and counterweight). White opal glass shade with a clear, folded edge. + 1 white porcelain switch. All fittings are aluminum: socket, shade support, pulleys, and counterweight. 25 cm diameter. Height adjustable, weighted. 2 pulleys. White twisted cord completely replaced. Just plug it in...