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Amgueddfa Cymru – Museum Wales
A 16-page booklet, on off-white paper, with black printed text. Full title: 'Electricity Supply Act, 1936. Approved Apparatus for Testing Stations for the examination, testing and regulating of electricity meters under section 2 of the Electricity Supply (Meters) Act, 1936. Loose (with other bills, acts etc.) inside a black hardback leather file.
