The one I remember had the 'straight' fin and rudder, and was a tail dragger (or optional floats). But after 50+ years, I can't remember if it had four seats or two, which is why I'm doubtful about it's Model type, but I do recall it had opening doors, a detailed interior, and two figures, one a guy in shorts with water skis, and some Judy in a swimsuit!
It looked similar to this one I fell out of a couple of times, although this is a 180, or 190 or whatever.