Gyrnos Tinplate Co (1921)
of Lower Cwmtwrch, Swansea
1886 Gyrnos Tinplate Co 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