I received this coin recently https://en.numista.com/catalogue/pieces3527.html and there is a nice variant story about it. See my photos on sheet.
Generally the "no rope" variant is referenced only for 1988 but it seems there are more.
Could you have fun digging in your albums, particularly if you collect all dates and tell if you have the "rope" or "no rope" types ?
Then the story will come complete
Thanks,
André
Quand l'Histoire et la Géographie se croisent sur nos pièces de monnaie ...