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Incorporated in January 1912 with £20,000 capital to take over Llwynhelig Colliery, Cwmdare, from Rees Llewellyn and Sons.
| Mine | Region | Years |
|---|---|---|
| Llwynhelig Colliery | Rhondda Cynon Taf | 1912–1915 |
Record created: 7 October 2026 · Last researched: 7 October 2026
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