Could be a SEA OX - they were made by North American Fiberglass, I think, out of North Carolina?
They were a heck of a boat in there time - much like a Parker!

Think they stopped production (out of business?) many years ago but don't know who ended up with the molds? Some of the Carliiiina folks on here will know more.
They had a good amount of wood - but so did most other boats back then!
Never heard anything negative about them - supposedly good, solid made boats! Models from about 17-2?ft.. Frank White of the old "Southern Sportsman" TV show (out of Greenville, NC) use to have them as a sponsor. Not sure what ever happened to the show but I really enjoyed it!
That's about all I know about them.
Regards,
Bruce W