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 148,439 pages of information and 233,876 images on early companies, their products and the people who designed and built them.

Llewellyn (Plymouth)

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Coal company, of Merthyr Tydfil

Previously Hill's Plymouth Co Ltd.

1930 Agreement with other coal companies to form Welsh Associated Collieries

1933 Output of 500,000 tons/year from 7 mines at Merthyr

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