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 pattern of a self-indicating non-automatic weighing machine as descirbed herein : submitted by W & T Avery.
Great Britain.Department of Trade and Industry.
National Weights and Measures Laboratory.
W & T Avery Ltd.
Teddington : National Weights and Measures Laboratory,
1987.
Weights and measures
Weighing-machines