Circular Brass Adjustable Air Vent AV22

Original, quality late 19th century cast brass circular wall mounted air vent with a central knob to adjust the control. This super example has six open veins, four countersunk screw holes for mounting to the outer frame, and the makers' mark for "W. McGeoch & Co, Glasgow". Polished and lacquered, although the lacquer may be removed at no extra cost and complete and in good and working order.