Well, the stains look authentic........
 

Not knowing much about Cracker Jacks, what are the signs that it's a fake? Stains are easy to fake, but it's pretty obvious those pin holes have been there for a long time.

David,

Unless this guy has an incredibly bad scanner (I doubt it), the color of the red background and the whiteness of the borders as well as the contrast between the two are tipoffs.

I'm no Cracker Jack expert either, but the color stands out like a sore thumb.

David,

May I suggest that you compare the following example that Baseballrarities sold on eBay to the card in question? Sometimes you just have to put the cards side by side.