Gyrnos Tinplate Co (1921)
of Lower Cwmtwrch, Swansea
1886 Gyrnos Tinplate Co was formed; it operated on the Glamorgan side of the Twrch.
1937 British Industries Fair Advert for Welsh Tinplate Works. Tinplate and Blackplate. (Engineering/Metals/Quarry, Roads and Mining/Transport Section - Stand No. D.328).
Sources of Information
- * 1937 British Industries Fair Advert pp666 and 667; and p371
-  Cwmgors a'r Waun