1990's seacraft Vs. 1970's & 1980's SF?

[jtnole02]

I have been looking for a 70's or 80's seacraft when I found a 1990. Does anyone know how the 1990 models were made? I think that someone on this site told me they were not make by potter anymore but still good boats.

Also, when did they start making them with fiberglass stringers as apposed to wood?

Any insight would be great.