of Wolverhampton and Leeds
1919 Excelsior Motor Radiator Co of Leeds was incorporated.
WWII Marston Excelsior made metal fuel tanks for Wellington Bombers and other aircraft; pioneered development of flexible non-metallic fuel tanks, and self-sealing covers through collaboration between ICI experts in dyestuffs, leathercloth, metals, paint and plastics.
1961 Designers, fabricators and sheet metal workers in aluminium and cuprous alloys, uranium, zirconium, tantalum, reinforced plastics and synthetic rubbers. Heat transfer specialists. Products include heat exchangers, pressure vessels, pipework, bursting discs, special purpose machines, industrial fans, flexible tanks for aircraft and bulk storage and transport of liquids. 
1966 part of Imperial Metal Industries when it was listed on the LSE.
1969 Part of Imperial Metal Industries
Sources of Information
- AA.  Image courtesy of Aviation Ancestry