Wis. Stat. § 134.30
Any person, firm, corporation or association, who or which makes for sale, or sells or offers to sell or dispose of, or has in his, her or its possession with intent to sell or dispose of, any article of merchandise made in whole or in part of inferior metal having deposited or plated thereon or brazed or otherwise affixed thereto a plate, plating, covering or sheet of gold or of any alloy of gold, and which article is known in the market as "rolled gold plate," "gold plate," "gold filled" or "gold electroplate," or by any similar designation, and having stamped, branded, engraved or imprinted thereon, or upon any tag, card or label attached thereto, or upon any box, package, cover or wrapper in which said article is encased or enclosed, any word or mark usually employed to indicate the fineness of gold, unless said word be accompanied by other words plainly indicating that such article or some part thereof is made of rolled gold plate, or gold plate, or gold electroplate, or is gold filled, as the case may be, is guilty of a misdemeanor.
Wis. Stat. § 134.30