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Tinplate makers at Cwmfelin, Swansea, which owned Cefngyfelach Colliery by 1893 to fuel their works.
| Mine | Region | Years |
|---|---|---|
| Cefngyfelach Colliery | Swansea | 1893–? |
Record created: 10 October 2026 · Last researched: 10 October 2026
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