Ocean Magic star tail

Heres a nice late 70s Ocean Magic with rare star tail. Its 6'10 x 21 , probably shaped by Pete McAllum, although unusually its not signed so could be an early Semmens shape ? I'd say it dates to around '77. The star tail is pretty unusual , dropping down to a point with curved sides, unlike a bat tail which is a lot more angular and pointy on the rails. The board has an early pictorial OM logo, very cool and unfussy silhouette of a surfer doing a top turn (worryingly missing a hand poor chap ) and folky text. The deck panel has an original resin drag in blues and whites, masked and pinlined , quite an unusual feature going over the logo  ; and a light green tint on the rest of the deck. There is a star pattern at the star tail. I think originally there was a rubber leash plug , you can see the circle where its been . In all a cool old board with some unusual features .