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Owners of Cwmnantygroes level at Abertillery, recorded as working it from about 1840 into the 1890s.
| Mine | Region | Years |
|---|---|---|
| Cwmnantygroes Colliery | Blaenau Gwent | 1840–1899 |
Record created: 16 October 2026 · Last researched: 16 October 2026
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