Unfortunately, most of Sways vintage board gurus have moved on.
There maybe one or two still around.
Better pics please. Can’t tell anything from that pic other than the three stringers. Pencil marks along the stringers. Fin type, tail block pics etc. I personally do not know of a Hansen “Model” from those days that had a blunt nose and/or nose block. So I would want to look close enough to see if that was done later. Can’t tell from your pic what type of tail? Square? Round? So I am assuming a Hansen logo is on the deck? I don’t see anything on what I guess is the bottom(your pic)?