restaurants outdoor coca cola sign

thought i would share this item with you. my parents ran a restaurant in ohio for years until my mom passed away twenty years ago. i own the building now, but the city said the sign had to come down. it still works and only has a slight crack in the plastic on one side. i cant seem to find one like it and was wondering if anyone might know how old it is. it is 4' x 6' and i know it has hung on the outside for at least 30 years. thanks