If you are asking about copyright, rather than trademark restrictions, there's generally fair use allowed for pictures of casino chips when they are offered for sale by a collector or dealer.

§ 113. Scope of exclusive rights in pictorial, graphic, and sculptural works47
(a) Subject to the provisions of subsections (b) and (c) of this section, the exclusive right to reproduce a copyrighted pictorial, graphic, or sculptural work in copies under section 106, includes the right to reproduce the work in or on any kind of article, whether useful or otherwise.

(b) This title does not afford, to the owner of copyright in a work that portrays a useful article as such, any greater or lesser rights with respect to the making, distribution, or display of the useful article so portrayed than those afforded to such works under the law, whether title 17 or the common law or statutes of a State , in effect on December 31, 1977, as held applicable and construed by a court in an action brought under this title.

(c) In the case of a work lawfully reproduced in useful articles that have been offered for sale or other distribution to the public, copyright does not include any right to prevent the making, distribution, or display of pictures or photographs of such articles in connection with advertisements or commentaries related to the distribution or display of such articles, or in connection with news reports.

I'm not a lawyer, but this is my interpretation of the law.

The link below will allow you to read the entire text of the Copyright Law of the United States of America
and Related Laws Contained in Title 17 of the United States Code if you have a couple of hours to spare [g].