The last 4 digits tell you the month & year the boat was built - December 1976. It could be designated a '79 because it was not sold/delivered/titled to the original owner until 1979, but it is actually a model year 1977 since it was built after August. Confused yet?
SEC - manufacturer
63 - model designation
006 - hull #
12 - month
76 - year
P.S. welcome to the site.
