Found a Takayama Fish

Got a good deal today from a guy that does not want to surf anymore. The board is in rough condition but I think it would be perfect for my to attempt my first restoration. I’m assuming it’s from the late '70s. The fins look quite different than anything I’ve ever seen. Like a pre FCS pop out fin system or something. I hope that someone could direct me to some pictures of a similar board in better condition.