Age and Value?

A few years ago I bought a 16'9" Daysailer and I am now thinking of selling, but I want to know if I've got something of a classic. The Hull # is 5471 and the Class #869. It has molded fiberglass seats, lever style centerboard. From what I've gathered from other postings, this might be a very early model, but others have me wondering. Are there other indicators of age? What year do you think it was made?
Bob Dean (altmailbox-at-comcast.net)
Bob Dean (altmailbox-at-comcast.net)