Though the bow deck had many reasons that lead me to believe it had been redone/modified sometime in the middle of the boats life, this lower deck was likely factory. It was actually marine plywood, and held on with stainless fasteners to boot. And, it was significantly more rotted as well. If it wasn't for that foam holding it up, it would have fallen in between the stringers. Also, notice that bulkhead. I wasn't exactly expecting a single bulkhead there.