It appears to be an '81 to '83. Judging by the componts it's not an '84. The frame has lugs more simlar to Italian than Japan built . Piaggio aquired Bianchi in the early '80s, throughout the mid '80s Piaggio labeled Bianchis were varied; some Italy, others Japan built. (the models out there were all over the place as far as what was what) Some members have some degree of success in determining year and other.. by the ser. #, I find that tricky. No doubt others will give there take. It looks like my '82 but then again I've yet to nail mine down.