Article 187
ART. 187. Importation and disposition of falsely marked articles or merchandise made of gold, silver, or ohter precious metals or their alloys.—The penalty of prision correccional or a fine ranging from 200 to 1,000 pesos, or both, shall be imposed upon any person who shall knowingly import or sell or dispose of any article or merchandise made of gold, silver, or other precious metal, or their alloys, with stamps, brands, or marks, which fail to indicate the actual fineness or quality of said metals or alloys. Any stamp, brand, label, or mark shall be deemed to fail to indicate the actual fineness of the article on which it is engraved, printed, stamped, labeled or attached, when the test of the article shows that the quality or fineness thereof is less by more than one-half karat, if made of gold, and less by more than four one-thousandth, if made of silver, than what is shown by said stamp, brand, label, or mark. But in case of watch cases and flatware made of gold, the actual fineness of such gold shall not be less by more than three one-thousandth than the fineness indicated by said stamp, brand, label, or mark.