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 an automatic weighing machine of the gravimetric filling type : submitted by Spiro-o-Screen Ltd.
Great Britain.Department of Trade and Industry.
National Weights and Measures Laboratory.
Spiro-o-Screen Limited.
Teddington : National Weights and Measures Laboratory,
1989.
Weights and measures
Weighing-machines