Just acquired a board made in early 1968. It has what appears to be a Waveset box and fin, but it is different from any other Waveset I have seen. Neither the box nor the fin have a Waveset logo. However I have every reason to believe they are original. The metal inserts are flush with the bottom of the box, rather than being above the bottom of the box. And the fin is flat on the bottom, rather than notched at either end. Hopefully this will be visible in the pics. The first two pics are of a typical box and fin. The second two are of the box and fin fromthis board. Has anyone ever seen a similar box and fin? Perhaps these were prototypes that made it on to a production board?