hello all, my first experience in old weapons was a sword found in the desert of N. Africa, a good friend who was the man got my interest in primitive archery begun. we were re-enactors, blacksmiths, anything medieval or renaissance was our passion. that sword was dated to the crusade period, apparently the local tribes dig them up frequently then use them as tools (sadly) but it was very well built to standards i never imagined possible, so that point on this arrow seems entirely feasibly authentic. of course the desert is famous for preservation. as to the rust ? that is possibly ongoing from current exposure, archaeologists try to keep artifacts sealed for that reason.