15 U.S.C. § 297: Stamping plated articles

In the case of articles of merchandise made in whole or in part of an inferior metal, having deposited or plated thereon or brazed or otherwise affixed thereto a plating, covering, or sheet composed of gold or silver, or of an alloy of either of said metals, and known in the market as rolled gold plate, gold plate, gold filled, silver plate, or gold or silver electroplate, or by any similar designation, so imported into or exported from the United States, or so deposited in the United States mails for transmission, or so delivered to any common carrier, or so transported or caused to be transported as specified in section 294 of this title , no such article, nor any tag, card, or label attached thereto, nor any box, package, cover, or wrapper in which such article is encased or inclosed, shall be stamped, branded, engraved, or imprinted with any word or mark usually employed to indicate the fineness of gold, unless such word or mark be accompanied by other words, plainly indicating that such article or part thereof is made of rolled gold plate, gold plate, or gold electroplate, or is gold filled, as the case may be, and no such article, nor any tag, card, or label attached thereto, nor any box, package, cover, or wrapper in which such article is incased or inclosed, shall be stamped, branded, engraved, or imprinted with the word “sterling” or the word “coin”, either alone or in conjunction with other words or marks. applies or causes to be applied to any article of merchandise intended for sale or customarily sold as a complete product to consumers in any State, by stamping, branding, engraving, or otherwise, any quality mark or stamp indicating or purporting to indicate that such article is made in whole or in part of gold or silver or of an alloy of either such metal; or imports into any State any such article of merchandise bearing any such quality mark or stamp which indicates or purports to indicate that such article is made in whole or in part of gold or silver or of an alloy of either such metal, Apply or cause to be applied to that article a trademark of such persons, which has been duly registered or applied for registration under the laws of the United States within thirty days after an article bearing the trademark is placed in commerce or imported into the United States, or the name of such person; and if such article of merchandise is composed of two or more parts which are complete in themselves but which are not identical in quality, and any one of such parts bears such a quality mark or stamp, apply or cause to be applied to each other part of that article of merchandise a quality mark or stamp of like pattern and size disclosing the quality of that other part.