"arc " type fin

Well, I´m into fins, right now. so, anybody made or use an “arc” type fin? I don´t think that I dreamed this fin… i´m not sure, but i think that this fins was used in the sixties. or may be in my designs dreams…

nobody meet this fin… ? It´s like an arch, but soften and flaten, thinner, with rounded corners. the bases can be smaller or bigger than the “top”… with a vertical “elypse” hole in the middle of each base, i think lesser drag will be