Established in 1852 as Lejeune & Perken; known to have manufactured cameras for other manufacturers, as well as equipment bearing their own label; as Magic lantern manufacturers they used the trade name 'Optimus'; became Perken, Son & Rayment in 1887; from 1900 became Perken Son & Co. continuing in business until at least 1940. Based at 99 Hatton Gardens, London.