1974 Belgian 1 Franc Coin Collectible International Coin Collecting #B.

I found these coins in a random Lego lot I purchased and offered to return them to the owner who did not want them back. So now they are looking for a new coin collection to join! To be fully transparent,  I know nothing about coins so cannot accurately describe these. I would say each coin has more than likely been in circulation and will show wear. I took up-close pictures of the back and front of each coin so please assess condition by looking at the pictures, zooming in, etc. I have not attempted to clean these as I was told cleaning can devalue the coin. I'm happy to answer any questions or post more pictures if desired. Thanks for taking a look!