N.J. Stat. § 45:22-36
Any person or persons, firm or firms, partnership or partnerships, association or associations, corporation or corporations, engaged in the business of buying or selling watches, or any agent or servant thereof, who may sell a second-hand watch or in any other way pass title thereto shall deliver to the vendee a written invoice bearing the words "second-hand watch" in bold letters, larger than any of the other written matter upon said invoice. Said invoice shall further set forth the name and address of the vendor, the name and address of the vendee, the date of the sale, the name of the watch or its maker, and the serial numbers (if any), and any other distinguishing numbers or identification marks upon its case and movement. If the serial numbers or other distinguishing numbers or identification marks shall have been erased, defaced, removed, altered or covered, said invoice shall so state. The vendor shall keep on file a duplicate of said invoice for at least five years from the date of the sale thereof, which shall be open to inspection during all business hours by the prosecutor of the pleas of the county, in which the vendor is engaged in business or his duly authorized representative.
N.J.S. § 45:22-36