North Star 23''''
I am guessing that you are looking at a Northstar 727. The dead give away on this is the fractional rig. These were really neat Bruce Farr designed raceboats. In their day they really broke new ground. I always had a warm spot in my heart for these wonderful little boats. If I remember correctly they had cast iron keels and bolts which should be checked carefully. Otherwise they were simple boats that should have held up well. I had a Northstar 500 and thought they were well built.