Plate Assay Act, 1783

No single parcel above 6 ounces,

except a single piece.

XIX. Provided also, and be it further enacted, That no single parcel whatsoever of wrought gold (brought to either assay-office to be assayed as aforesaid,) shall contain more than six ounces in weight of gold wares, save only and except such parcel contains a single piece of work made of gold.