It's a ski supreme sierra supreme. The 2 that i have seen the floor and stringers were rotted out. I bought one as a project and ended up just giving up.
They usually have 2 captains chairs and then a back seat and an open bow. I would just check out the floors and stringers If those are good your fine. The problem is that if the floors and stringers aren't in good shape you have to completely remove the top deck to gain access to the floor.