Here's something I didn't even know existed, an alternate version of Jim Aparo's striking Aquaman illustration for the 1977 Super DC Calendar! It's currently on hold as part of an online auction, which F.O.A.M.er Ilke Hincer was kind enough to send the Shrine's way.
Judging by the final version seen below, I assume that it was redone because in the above piece, the figures are so small and less impactful. If that was the case, you can see DC ultimately made the right choice. Still, any "new" Jim Aparo Aquaman art is worth seeing, thanks Ilke!