Adamant Engineering Co
of Dallow Road, Luton, Bedfordshire
1878 J. C. Threadgold established business of engineers and founders at Luton[1]
1919 Incorporated as private company to take over the business of engineers and founders of J. C. Threadgold and Sons
1921 Began production of Marles steering gear for the Marles Steering Co Ltd, which never engaged in manufacturing
1924 Acquired exclusive rights to the Marles gear for the UK under licence
1937 Mechanical engineers.
1946 Acquired the Marles Steering Co Ltd
1950 Agreement with Gemmer Manufacturing Co for exchange of information and exploitation of any improvements worldwide made by either party.
1951 Formation of public company Adamant Engineering Co (Luton) Ltd to take over the private Adamant Engineering Co[2][3]
1955 Merger with Western Manufacturing of Reading to form Adamant and Western Engineering[4].