Certificate pursuant to Section 12 of the Weights and Measures Act 1985 ... certification no. 2437/39 .. 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.
E. K. Williams Ltd.
National Weights and Measures Laboratory.
Teddington : National Weights and Measures Laboratory,
2005.
Reference no. STD/T1118/0008.