This appears to be your coin. It has a reeded edge with a 'star' and and the lettering 'Belgie' and 'Belgique'.
https://en.numista.com/catalogue/pieces8134.html
The other 5 franc coin issued that year shows the word 'Belgique' on the left of the obverse.
https://en.numista.com/catalogue/pieces7284.html
https://en.numista.com/catalogue/pieces8134.html
The other 5 franc coin issued that year shows the word 'Belgique' on the left of the obverse.
https://en.numista.com/catalogue/pieces7284.html





















