If scales are used with weights, those are in more need to be certified. I observe that, over here, we had the King's crest punched in weights, that were applied by the official of the Royal checking office.
I have this (rather) rustic weight, i think for flax weighing, originally forged in 1818, as may be read. Then at a later stage (1831?), either because weight standards criteria was altered or its mass was tampered with (the usual ancient cheating trick), its owner had to add some more iron to it, for a new certification.
In the first issue you may see the King's crest (Dom Joćo VI). In the second check up, the mark is not so clear.
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