Bob,
Great article. The Champ picture was taken on opening day (prior to the start of the game)... it's the same as the picture in this thread, though from a different angle. It's also the same image used on one of the 13 Bond Bread cards.
This is speculation, as I wasn't alive in '47, but I'd be willing to bet that the Champ Hats premium came out after the season was finished in October.
Here's why: Branch Rickey had forbid Jackie from signing any endorsement deals during the season. It wasn't until October of 1947 that Rickey conceded, and allowed Jackie to sign his endorsement deals with Bond Bread, Old Gold, Borden's Milk, and perhaps Champ Hats? (See this article, where it mentions he endorsed hats:
http://www.markroesler.com/pdf/articles/business.pdf ) While he was part of the larger Bond Bread card set, the fact that there is such a small checklist leads me to believe some sort of agreement was signed for using his likeness. Calling him the newest Dodger champ would make sense too, considering the Dodgers won the NL pennant.
Dixie Walker and Jackie were both highly sought after in terms of endorsements. As I stated in another thread, Walker was the face of Wonder Bread... Jackie, of Bond Bread.
With that being said... Walker was traded to the Pirates in December, 1947. With Robinson's premium being different (horizontal) than the other two, I wouldn't be surprised if his was released at a different date (perhaps later). I'm guessing the premium came out in late October / early November, 1947.
On another note, the other premium shows Robinson wearing a fielder's glove as opposed to a first-base mitt. That leads me to believe that the second photo is likely from 1948 or 1949 (given the Tigers uniform of Wakefield).
Hope all that information helps!