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Amgueddfa Cymru – Museum Wales
Typed in black ink on white paper. Escher Wyss Ltd. headed paper, which is printed in black ink. Signed and stamped by the London Escher Wyss Limited London Technical Office. A letter adressed to E.Ivor David at Powell Duffryn House, from Escher Wyss Ltd. replying to a letter (see 83.184I/62 (6)) regarding the turbo alternators at Middle Duffryn Power Station. Dated 22th December 1952, and signed in blue ink. Loose within pink/peach card file with other documents relating to Middle Duffryn and Bargoed High Pressure Station.
