Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 145,403 pages of information and 230,731 images on early companies, their products and the people who designed and built them.
J. P. Hall and Co of Blackriding Iron Works, Werneth, Oldham.
1887 Company established by Joseph Platt Hall.
1894 Combined dynamo and high-speed engine. 
1914 Electrical and general engineers. Specialities: electric generators, motors and accessories for continouous and alternating current.