Firefly by Duple:
Olwyn Goch Mine-shaft - Headframe, Rhydymwyn, Flintshire.
Firefly by Duple:
Pen-y-Bryn Mine shaft-bottom, Halkyn Lead Mine, Flintshire
Firefly by Duple:
Pen-y-Bryn Mine-shaft - Headframe, Halkyn Lead Mine, Flintshire
Firefly by Duple:
Olwyn Goch Mine-shaft - hoist house and mine-cars Rhydymwyn, Flintshire.
Firefly by Duple:
Olwyn Goch, Rhydymwyn, Flintshire, North Wales.
Firefly by Duple:
Pantymwyn Lead Mine, New Shaft, (Also known as Mold Mines), Flintshire, North Wales - 1936.