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 self-indicating and price-computing weighing machine with associated label printer and mechanical handling facilities.
National Weights and Measures Laboratory.
Portals Engineering Ltd.
Teddington : National Weights and Measures Laboratory,
1990.
Reference no STD 6151
Weighing-machines