The history of the Tri-Club mold gives some clues about where and when those chips might have been used.

From the Burt Co. order card records, we see that the Tri-Club mold was originally used by Jaymyers Ltd., A. B. P. Casino supplies and later John Huxley from the 1960s into the early 1980s. Mainly used in Great Britain and Europe.

Later around 1986, Joseph Fabrizio and Don Jarchow buy Langworthy, and somehow get exclusive rights to the Tri-Club mold. They open the Gambler's General Store around the same, and sell chips on that mold from the store. They mainly sell hot stamped and sometimes inlaid chips on the mold to non-Nevada establishments. From what I understand the Tri-Club mold was not licensed by Nevada Gaming Control for denominated casino chips.

The mold was used in Nevada for non-denominated casino chips, for which the mold did not need to be licensed. It shows up as being used as tournament chips and roulette chips, in Nevada, and especially in Las Vegas. Gambler's General store would be a convenient place to go if they needed an order of chips fulfilled very quickly.

The use of the mold stops completely around 1998.

The "Amusement Only" hot stamp makes me think that perhaps these chips fell into that category, and they were made between 1986 and 1998 by the Stardust Casino for some type of function that did not use pre-existing casino chips, and did not require approved casino chips. Odd that they would have a "$" sign on them though.