Gorseinon Tin Plate Works was owned by the Lewis family of Gorseinon and was in production from 1881 to 1923. The site was subsequently acquired by Richard Thomas & Co. who, in 1926, moderrnised and rebuilt the site. The factory became known as the Steel Company of Wales in 1947. The tinplate works closed down in 1957, and the buildings demolished in 1988.
Source: Cambrian Archaeological Projects Report 464, 2006 [Cat. Ref. CAP464]
L. Moore, RCAHMW, 7th January 2013