It is French a 1/2 Franc coin first produced in 1965, prior to this the half franc was called 5o centimes Composition nickle Paris mint 63,360,000 produced and sorry to say not worth very nuch. I cant see any errors on it though?
I do see what looks like some slight doubling in the 2nd and 3rd pics. You've got a good eye to pick that up for someone so new at this :thumb: