John S. Tregoning and Co
of Llanelly, Wales
1851 Company established.
1909 Incorporated as a limited company.
1914 Tinplate manufacturers. Specialities: tinplates for gas meters and dairy work; for stamping, decorating and food packing; blackplates for enamelling, deep stamping, trunk and bucket making. Employees 375. 
1937 British Industries Fair Advert for Welsh Tinplate Works. As part of Richard Thomas and Co. Tinplate, Blackplate and Terneplate**. (Engineering/Metals/Quarry, Roads and Mining/Transport Section - Stand No. D.328) 
1957 Bynea Holdings was formed by John S. Tregoning and Co Ltd in conjunction with Ductile Steels Ltd and Robert Benson, Lonsdale and Co Ltd to purchase Bynea Steel Works from the Holding and Realization Agency. A regrouping of Bynea Steel Works Ltd and its subsidiaries took place such that the company owned the whole of St. Davids Tinplate Co, Glynhir Tinplate Co and Gorse Galvanising Co, as well as a controlling interest in Webb, Shakespeare and Williams Ltd.
- Terne - an alloy, chiefly of lead and tin