Extractor fan, 4-bladed, with Hoover Mk IV Electric Motor to "BS 170" for 220V, 50Hz, 1ph (1962) within duct originally for `Sirocco' 6-bladed M-series fan, by Davidson & Co. Ltd, used by A. Saunderson, Upholsterer, Sevenoaks, Kent (formerly part of 1987-846 Carding Machine) 4-Bladed Extractor Fan with Hoover Electric Motor 1962