Llynypandy and South Llynypandy Mines and [Old] Drainage Tunnel: reduced plans and sections from old plans by J J Williams. Scale: 1:2500.
A7/3.
Llynypandy and South Llynypandy Mines and [Old] Drainage Tunnel: reduced plans and sections from old plans by J J Williams. Scale: 1:2500.
A7/3.
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