I need to find out what year and model this serial number on the boat is. I ran the MIC and it says is from Continental Sailcraft <br />CTL15195M78F-RT i thought that the hull numbers were 12 digits, with the first three representing the company, the next five hull number and next two date, and the last two the model year, but the hull number i have is 12 digits plus another two at the end, i don't how to interpret it.