Cowlishaw Walker and Co
of Biddulph, Stoke-on-Trent, Staffordshire, were makers of mining machinery and power presses.
Pre-WWI Cowlishaw Walker and Co were maker of colliery machinery
WWI Took up the production of shell forgings and other articles of warfare.
1925 Private company formed as C. W. Engineering Co
1930 Took over the workshops of the Norton and Biddulph Collieries.
1946 Name changed.
1948 Company made public.
1961 Iron founders and engineers, specialising in the manufacture of coal cutting and mining machinery. 
Sources of Information
- The Engineer 1918
- 1961 Dun and Bradstreet KBE
- The Times, Jan 17, 1974
- British Steam Locomotive Builders by James W. Lowe. Published in 1975. ISBN 0-905100-816