International Yacht Corporation is also known as Helson. They made boats between 1973-1978. They are fantastic boats. I have a 22' Helson. It is fully restored including new paint. I will post pictures to see if we are talking about the same boats, but i am almost positive that I am correct. I am looking for a spinnaker for this boat if anyone has any good ideas. I am looking for used because they are obviously over priced. Thanks!