It all looks original except for the hatch. The compression post (mast) photo is upside down (either that or the installation is very unusual
).
On the side of the centerboard trunk, the bulge looks like it has a chunk of fiberglass missing. The bulge is a pocket that encloses one of the centerboard mounting wedges. It's hard to imagine how it could have been damaged by direct contact, but it might have been subject to torsion if the centerboard hit something. That could explain why it doesn't move in the trunk (I'm assuming the centerboard isn't resting on a keel roller or bunk). It could also explain why the hatch was installed, to provide a better inspection port than the two small ports aft of the cuddy bulkhead.
On the bottom of the boat below the centerboard pivot point there should be two stainless steel plates, each with two screws in it. These secure the mounting wedges. It would be a good idea to see if the gelcoat around the plates is cracked. This could be another sign of damage.