It's not a coin but a token. Looks to be the same as two in the Numista Exonumia catalog but I think they're the same. Sorry but I can't help you with value.
It is a gold-plated copper-nickel commemorative token that was made by the (no longer existing) private company Het Belgisch Munthuis in Antwerp. Its value is whatever someone is willing to give for it, but I saw it at an online auction at 1€.