Certificate pursuant to section 12 of the Weights and Measures Act 1963 ... the Secretary of State for Trade and Industry hereby certifies as suitable for use for trade the following pattern of a self-indicating counter machine of the hanging scale type : submitted by W & T Avery Ltd.
Great Britain.Department of Trade and Industry.
National Weights and Measures Laboratory.
W & T Avery Ltd.
Teddington : National Weights and Measures Laboratory,
1988.
Weights and measures
Weighing-machines