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 137,397 pages of information and 221,173 images on early companies, their products and the people who designed and built them.

Security Rock Bits

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of Openshaw, Manchester.

  • 1954 Private company.
  • 1961 Manufacturers of rock bits used in oil well drilling operations. 250 employees. [1]

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