B/W print; portrait William Sebastian Graff- Baker, by Walter Bird, c 1947

Portrait photograph of William Sebastian Graff-Baker (1889 - 1952), Assistant Chief Mechanical Engineer of the Underground Group from 1922, and Chief Mechanical Engineer (Railways) LPTB, from 1935. W S Graff-Baker headed the design team at Acton Works responsible for the experimental streamlined 1935-tube stock, 1938-tube stock, and the O, P and Q surface stock cars. He was also involved in the design of train equipment, lifts and escalators.