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Amgueddfa Cymru – Museum Wales
Navy blue hardback cover with title printed in gold. Inside the file, documents are printed in black ink on off white paper. Manual of instructions on electrical, mechanical plant operations, planning, surveying, stores and ventilation. Contains maps and drawings of electrical power stations, sub stations and supply lines connected with all collieries of the Amalgamated Anthracite Collieries Co.Ltd., c1945.
