These coins come from around the time of the German occupation of Belgium during World War II. Some are made of zinc, some of nickel-brass, and some of copper-nickel. Most of these coins that you find are not in good shape; they have been worn and stained over the years. If you find a nice-looking specimen, you have a coin with decent collector demand.
As to value, they are all low-value coins except for a few notables. Approximate values for all the non-notable coins, regardless of date and denomination, go like this:
worn: less than $1 US dollar approximate catalog value
average circulated: $1
well preserved: $4
fully uncirculated: $12
As with all our coins quoted on CoinQuest, these are catalog values which must be converted to actual values based on our Important Terminology page.
The *notable* coins are listed below, with approximate cata values for average circulated coins which have no problems such as spots, stains, nicks, or cleanings.
5 centimes, 1938, medal alignment: $10 US dollars
25 centimes, 1938, medal alignment: $10
The two *notable* coins must display medal alignment to be valuable. To determine if your coin has medal alignment, hold it between your thumb and index finger showing the Belgique-Belgie and three crowns upright. Your index finger must be at the top of the coin, and your thumb at the bottom. Now flip the coin from left to right, like turning a page in a book. If you see the crown at the top and the date at the bottom, you have a coin with medal alignment. Most coins (the common, low-value ones) will have the crown a the bottom and the date at the top. This is called 'coin alignment.'