Hello: I am researching a surfboard for my son. It is made by Hansen, and has a signature on it "designed by Jerry Lopez". It is 7'. 6" long, and in great condition. I estimate it to be 70's. We are specifically looking for some kind of story or history about the board, and an estimate of value. Hansen thought it could be one of less than 1000 made, although it does not fit in with the length criteria they gave, which was 5-7 ft. (this one is 7ft. 6"). Hansen also said there are some good books out there regarding histories and values on boards, but the rep. did not give titles, and I have not been able to find any. Any and all help would be appreciated.