Certificate pursuant to 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 the following pattern of a cold water-meter ... : submitted by Schlumberger Industries.
Great Britain.Department of Trade and Industry.
National Weights and Measures Laboratory.
Schlumberger Industries.
Teddington : National Weights and Measures Laboratory,
1994.
"Reference no: STD 6732"