Stanley Engineering Co
of Egham, Surrey
of Monskdale Road, Oldfield Park, Bath, Somerset
1938 M5 engine built for Marconi and rated at 1 hp [1]
1938 Advert: Argson Invalid carriage and Marconi-Stanley portable engine for wireless transmitters
1954/5 Acquired by C. E. Harper Aircraft Co from Metropole Industries[2]
1958 Maker of petrol and electric invalid cars and equipment for the disabled; part of the Harper Group[3]