Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 144,932 pages of information and 230,620 images on early companies, their products and the people who designed and built them.
An 1810 double-faced mill clock from Park Green Mill is on display at Manchester's Museum of Science and Industry. One face showed normal time, while the other was connected to the water wheel, such that it only registered productive 'mill time'. Workers could only leave on completion of their mill time.