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Amgueddfa Cymru – Museum Wales
A black leather ringbinder file containing plans, maps and statistics of old type hot mill plants owned by the Steel Co. of Wales and eventually closed down on the starting, first of Trostre, and later, Velindre Works. Includes information (alphabetised with dividers) relating to tinplate works in Ashburnham, Burry, Dyffryn, Gorseinon, Grovesend, King's Dock, Lydney, Mardy, Melingriffith, Old Castle, Pontardawe, Richard Thomas Mills and Teilo.
