I love the wonderfully cheesy sports covers on some of the early DCs, and World's Finest Comics features some of the cheesiest. Here is a copy of World's Finest 24 from my collection. I love it!

Musings about autographs, comic books and other neat stuff.
The missing comic is #13. I'm seeking this issue in the 6.5 range give or take a half a grade. It's more difficult than I anticipated... all that seems to come up are VG or worse copies. It is a difficult issue to find in decent shape and it will kill me to pay the price, because even thought it is the first appearance of The Watcher, #13 is not a very good story and among the weakest of the early Fantastic Fours.