I had this exact model of boat, but in a much more virulent green, bought sometime in the mid 90s (and it was old then), it was sold to me as a surf shoe.
Paddling it was 'interesting' due to the very long nose, and relatively short back. First boat I ever owned with a flat hull, mind...
Im afraid I can't tell you more than that, but I'd guess it was made in the 80s, if not earlier.