Certificate pursuant to section 12 of the Weights an Measures Act 1985, Certification no. 2536/54  in accordance with the provisions of section 12 of the Weights and Measures Act 1985 the Secretary of State for Trade and Industry hereby certifies as suitable for use for trade a pattern of a liquid flowmeter ... submitted by E.K. Williams Ltd.
Great Britain.Department of Trade and Industry.
National Weights and Measures Laboratory.
E.K. Williams Ltd.
Teddington : National Weights and Measures Laboratory,
2005.
Weights and measures