Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 137,400 pages of information and 221,179 images on early companies, their products and the people who designed and built them.


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December 1910. 'Okill' pressure indicator.
December 1912
November 1912. Testing gauge.

of All Saints Works, Bolton

Compression gauge

See Also


Sources of Information