hull ID on Potter Built

[Stephen]

I am pretty new to this sight as a user, but I have searched in the past for usefull info about Sea Crafts. I bought a 1980 23' Sea Craft from my good friend a couple of years ago. VIN# SEC 30091080. He bought the boat in 2001 from a guy in Jupiter, Fl. All the paperwork, reg, title, ect.. shows same vin #. Here is the tricky part, the transom has been closed in previous to my buddy buying and the first 2 letters are ground away leaving what appears to be a Y or something of the sort for the 3rd letter and the F30091080 are all legible. How can I tell if this a true Potter Built Hull? They have a vessle sticker ID under the ingraved #s stating the same as the Title. Buy the way great boat. Have'nt had it in the ocean yet, but great in the river.
Thanks,
Steve