It's a strange mix of budget and better quality components. I'll go with mid to late 80s for now, but someone has upgraded it here and there during its lifetime.
https://projetboussole.fr/products/multicycle-sport-1200
A bit of googling and this popped up.
Seems it is a Dutch brand.
Reconditioned by Francois who has been 'Lulled by the music of the English web radio NTS'. So that must add a bit of Anglo Saxon appealI also googled it, Decathon in France are selling one reconditioned so obviously also sold in France.
It's a strange mix of budget and better quality components. I'll go with mid to late 80s for now, but someone has upgraded it here and there during its lifetime.