Year boat was built

If the number is 3967 approximately what year was it built?

Probably around 1984.  I had 4086, built in 1985.
You can tell by the Serial number on the right of the transom.
See this link for how to decode:

I bought an older FS numbered 436 on the centerboard trunk, is there a way of tracking down the year it was made. I think it was around 1960. My insurance agent wants to know.

FS5516's picture

My guess is going to be around 1960-1963. So you're close. Our club Scot, 733, is a '67 or close to that. The hull ID came much later.