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Ordnance survey map 1:2,500
OS map: Rhymney Ironworks [East Side]. Gwrhyd pit, Terrace Pit, Maerdy Colliery, New and Old Duffryn, yard, Gwaen-Fawr and Twyncarno pits, Bryn oed level. Glamorgan sheet [photocopy]? 25" [no date, early edition].
Copy
Collection Area
Industry
Item Number
70.21I/7
Measurements
Length
(mm): 1436
Width
(mm): 1020
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