Bray, Markham and Reiss

of E.A.C. Works, St. Albans (presumably Electrical Apparatus Co, with which company this one was closely connected[1])
of Blackhorse Lane, Walthamstow, London, E.17 (1922)
1910 Maker of electrical switch gear
Henry Ralph Champion Partridge (d.1962) was a director [2]