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of Sheepbridge Works, Chesterfield
1929 Patent granted to John Harold Rackham and Sheepbridge Stokes Centrifugal Castings Co, both of Sheepbridge Works, Chesterfield, for an improved method of making the cylinder blocks of internal combustion engines.
1937 Ironfounders. "Centrard" Cylinder Liners. "Centricast" Cylinder Liners and Piston Rings. "Centrilock" Valve Inserts.
1939 See Aircraft Industry Suppliers
By 1943 Sheepbridge Coal and Iron Co had acquired nearly all of the capital of the company
1944 Completely owned by Sheepbridge Coal and Iron
WWII Made piston rings for aircraft and other engines
1949 Subsidiaries were :
1963 Motor Show exhibitor. Cylinder liners.
1968 The company was advertised as Sheepbridge Stokes (see advert)