Car Maintenance / They Also Serve / “Back room Boys” by Taylor, Fred (1875 - 1936)
Colored posters, The Baynard Press, London. One reference book (?) suggests that there were 8 posters in this series.
 
Matted, Image size: 24.1in x 20in (61.3 x 50.8cm). 
Overall size 29.1in x 24.1in (73.9 x 61.2cm).
Made in: UK, 1942 
Art-In-Industry collection number pp_387