Hoover 'Keymatic' model 3224 washing machine, designed and developed by Hoover Limited engineering laboratories, Perivale, Middlesex, and made by Hoover (Washing Machines) Limited, Merthyr Tydfil, Wales, with motors made at Hoover (Electric Motors) Limited, Cambuslang, Scotland, 1963 Hoover 'Keymatic' washing machine 1963