N.Y. Gen. Bus. Law § 229-g

§ 229-g. Marking watch cases sterling or sterling silver. Any person,\nfirm, corporation or association who makes or sells, or offers to sell\nor dispose of or has in his or its possession with intent to sell or\ndispose of, any article of merchandise comprised of works or movements\nand a case or covering applied or attached thereto, wholly or partially\nconcealing said works or movements marked, stamped or branded with the\nwords "sterling" or "sterling silver," unless said case or covering\nshall contain not less than nine hundred and twenty-five one-thousandths\nparts of pure silver, is guilty of a misdemeanor.\n