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National Smelting Company

Formed in 1917 with British Government backing to boost wartime zinc (spelter) production; it acquired the Swansea Vale Spelter Company's Llansamlet leasehold in 1924, becoming the country's largest spelter works by 1927.

Mines operated

MineRegionYears
Tynywain Colliery Neath Port Talbot 1924–?

Record created: 15 September 2026 · Last researched: 15 September 2026

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