In the UK every scale that is used to weigh a product with the customer present must have a display the customer can see. At places like supermarkets, this means the scales have a display on the front of the scale for the operator and a display on the rear of the display for the customer. At scrap yards the display is placed in a prominent position where the customer can see it.
There is no way round this, unless the operator wants to be caught breaking the Weights and Measures Act, and you don't want to be caught doing that.
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