[Coelacanth]

These chips are not likely to be used in a game - it's more for display purposes. They were bought through a random online distributor, not a manufacturer, so it's unlikely they can be sent back and stamped. What he's looking for is more like a tasteful souvenir type of chip - so labels might be too cheap looking, and he's not worried about ink fading with use, although if the chip surface doesn't take the ink well to begin with, then it's still no good.