The serial number is kept on file and to the original owner for the most part. If the boat has gone through a couple of resales, those owners would have to choose to register as the owner on file at BC, to answer your question. If you are the second owner, no problem.I have 96 Eyra that I bought from the family of a guy I fished in the same club with. Bought it in 2007. In the packet of info, I have the “sales receipt” from the old Ozark Marine where he bought it.As far as what number, they may give you the specific number like “28” but they wont tell you out of how many that year. Hope this helps.96 Eyra/12 Mercury 175 Pro XS with 2015 single axle trailer2017 Victory Gunner