Plate Assay Act, 1783

And gold manufacture of 22 carats marked (22) and initials of makers name,

stamped at assay-office in Dublin or New Geneva.

III. And be it enacted, That no person shall sell, exchange, or export, or cause to be sold, exchanged or exported, any gold vessel, gold plate, or other manufacture of gold being of the aforesaid standard of twenty two carats fine, unless it be marked with the mark of the maker, which mark shall be the number (22,) and the first letter of the christian and sirname of the maker, nor unless it be likewise stamped at the assay-office in Dublin, with a harp crowned, or at the assay-office in New Geneva in the county of Waterford, with a like harp and a bar across its strings, under the like penalty as aforesaid.