Who made this boat? 1962 Sea King 18ft metal hull with cuddy cabin?

I had aquired this boat from a gentleman here in collinsville, OK and i have no idea of who made it. It has two decals on the rear of the boat that say seaking but that is about it. The boat originally had a mercruiser sterndrive it looks like and maybe a chevy inline six. So that makes it a inboard\outboard but i have no clue about this things origin. I can also see where it had a army corp of engineers sticker on the side saying beaver lake with a three digit number above that. it has a plexigl front windshield and two sliding gl windows on the sides of the cuddy cabin. Definetly something from the 60's. The front windowshield says that right off. If you have any answers and history on this thing i would love to know. The more info the better.