It's not a coin; you won't find it in Krause.
We've seen several of these on the forum.
Here's one; in that thread, member valutarick says it's a Belgian gas token ("gas" here means town gas, piped into houses to burn for heating and cooking, rather than "gas" in the American sense of petroleum for motor vehicles). But I can't find any information to back this up.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis