Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,162 pages of information and 233,682 images on early companies, their products and the people who designed and built them.
Predecessor company: Bwllfa and Cwmaman Ddu Collieries
1930 Amalgamated with other companies into Welsh Associated Collieries
1936 Welsh Associated Collieries were absorbed into the Powell Duffryn Associated Collieries.