There’s a few ways that are non destructive that you can test these to figure out the composition.
The first would be specific gravity.
Weigh the token on a balance scale, then weigh it suspended in water.
Take the actual weight of the token and divide it by the suspended weight and this will give you a number that is the specific gravity of the token.
From there, look it up on a chart of published specific gravities and it will give you the composition within a range.

The other nondestructive method would be X-ray refraction. I own a coin business and we have an XRF machine if someone wants one of these tested.
I can send the token back afterwards.
With this method I call tell you what the composition including trace metals is within one hundredth of a percent of alloys with about a 1.5% margin of error.