I have an old Zephyr surfboard in pretty beat up condition that was a prop from my high school grad nite that was being thrown out. It has no signature or date so I'm not sure who shaped it or when, but it does have a genuine zephyr emblom on it. It is 7' 6" single fin, swallow tail and it definitely is from the 70s considering the condition and style of the shape. But can it be worth anything and did Jeff ever have anyone else shape under his label besides himself?