Hi, I also just purchased a Shark. The Sail number is US 576 and the Hull ID is MFG A3618 V74L. When I picked it up I didn't realize what I had purchased. Everything appears to be in good shape except the finish on the wood. I am also looking for more info about the Shark and it's history. I wouldn't mind getting another or a Phoenix which was also designed and built by the same people.