Hi Jim,
I hate to break the news, but the Sailstar isn't a Day Sailer, although they look very similar. I originally had a Sailstar (#01049) when I learned to sail in '93. I thought it was a Day Sailer after I saw an ad for them from sunfish-laser. After I contacted the class association, I learned the facts.
Sailstar made a copy of the Day Sailer with some variations, (The bow is wider, and the transom is flat (no gentle curve). The mechanism to raise and lower the centerboard is different, and there was a false deck put in.
It's my understanding that a lawsuit between Sailstar and O'day ensued. O'day lost the case. I'm no lawyer, but I think there are some ramifications from that case that affected the boat building industry to this day. What they are exactly, I don't know.
As to the age, it was probably built in the mid 60's.
There's a fellow that has one and here's his web site:
http://www.gillooly.com/
Click on the "sailing link" and you'll see the photos.