If there is any quality mark printed, stamped or branded on the article itself, there must also be printed, stamped or branded on the article itself the following mark, to wit: A trade-mark duly applied for or registered under the laws of the United States of the manufacturer of such article; except that if the manufacturer has sold or contracted to sell such article to a jobber, wholesaler or retail dealer regularly engaged in the business of buying and selling similar articles, this provision shall be deemed to be complied with if there is so marked on the article the trade-mark duly registered under the laws of the United States of such jobber, wholesaler or retail dealer respectively; and in such event there may also be marked on such article itself, numerals intended to identify the article, design or pattern; provided, that such numerals do not appear or purport to be a part of the quality mark, and are not calculated to mislead or deceive anyone in believing that they are part of the quality mark.
N.J.S. § 51:6-3