Selson Engineering Co
of Sunbeam Road, London NW10.
of 83 and 85 Queen Victoria Street and Lambeth Hill, London, EC; Works: Coventry (1914)
1871 Established by M. Selig and George Sonnenthal
1900 Company incorporated
1914 Engineers. Specialities: machine tools, hand tools and engineering specialities. 
They also acted as agents - e.g. at some stage acted for the sale of a Joseph Booth and Brothers 35, ton capacity breakdown crane to the Portuguese Government, via the Engineering Company of Portugal. The machine survives albeit converted to diesel power, in the museum at Entrocamento.
1920 September. Exhibited at the Machine Tool and Engineering Exhibition at Olympia with electric tools including a drill. 
1922 Manufactured shaping machines, lathes, radial drilling machines, etc.
1925 They acquired 'Selson buildings' in 26 and 28 Charles-street, London E.C. (one minute from Farringdon-street Station) and transferred offices there from June 1st.
1968 Bed-type milling machine. Listed as Sunbeam Machine Tool Co.