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The company recorded as owning Etna Colliery at Gilfach Goch by 1910; no further company detail has been found.
| Mine | Region | Years |
|---|---|---|
| Etna Colliery | Rhondda Cynon Taf | 1910–? |
Record created: 2 October 2026 · Last researched: 2 October 2026
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