So as promised a picture of fins for the early 1960s
Not sure about the fin with the hole and rope through it, it may have been a prototype leash attempt. It was likely to be just rope with a football sock tied around the ankle! This May be a little later but the fins are early sixties, how about the car, often surf cartoons were painted on the side
Traveling up the coast you were guaranteed to be pulled over and have minor nuisance fines, drugs were little known and so full car searches didn't happen!
About 1958 when I started surfing there was an inflatable strong rubber surf device called the surfplane, invented in the 1930s the next generation of surfers was hitting the waves on them, and could go in hordes in the designated swimming areas between the flags, swimming and bodysurfing was part of the school of waves.

- Unknown.jpeg (4.63 KiB) Viewed 789 times

- images.jpeg (8.7 KiB) Viewed 789 times
The surf craft of our group was a Coolite

- Vintage-Surfboard-Collectors.jpg (27.6 KiB) Viewed 789 times
This too could be used in the swimming area .It was EPS which was coming to Australia for refrigeration and insulation.
The Coolite required wearing a Tee Shirt as one session would reduce your chest and stomach to a red raw suppurating mess.
Ordinary oil household paint were tried as a coating, only to have the board dissolve into a slimy gelationous mass at your feet.
Plastic Paint had just been introduced to Australia, tins ( cans for Americans ) went missing and new coloured coolites hit the surf!
This was my starting Point I could graduate to a Balsa and Fibreglass board, when I proved to my father I could swim a mile, I also achieved a Surf Lifesaving Bronze medalion, so qualified as a lifesaver. So I gained my board
9'6'' Balsa pig shape, 3'' thick, D fin carved in Rocker and always under constant repair as water leaked in through any crack delaminating where the water soaked. A much loved first board, named the can opener because of the pointy nose.
A major step up the food chain.
I've taken up troll hunting just for fun, instead of a rifle I'll just use a pun! 冲浪爷爷