Jesse's got it right... as we know, everything is not is the books.
Something else about those 5's (I've got one also, use that puppy daily)... look the the no 5 on the back and then the no 5 on the handle. Different, eh? The 5 on the back of these skillets seem to be a more "stylized" font than any of the other slant logos.
And, just in case you were thinking that this type of handle might be tied to the slant erie without quotation marks...ferget it! I've got a #4, no quotes, tear drop shape scoop on underside of handle and no number on the top of the handle :P