Head of water unit for Malvern energy conversion kit, by Griffin and George Ltd. Head of water unit for Malvern energy conversion kit 1967-1983
Head of water unit from the Malvern energy conversion kit, made by Philip Harris Ltd., Lynn Lane, Shenstone near Lichfield, Staffordshire, WS14 0EE, England, 1988. Head of water unit from the Malvern energy conversion kit 1988