What is known definitely is that both the red and blue Fink wrappers were used for the 4th series, and that the red one was used for the 2nd series.
Conjectures include that the first series used the red wrapper with the "Printed in USA" tagline, and that the 3rd series may have used this Chef Girl wrapper. The fact that the 4th series used both red and blue is kind of suggestive of the 3rd series being released later (with only the blue wrapper). But it's all guesswork.
Maybe the OPC karma is changing. Certainly, finding some unopened material would help in clarifying the OPC releases. In addition to the "Printed in USA" wrapper & the chef girl wrapper, after what I would say is at least a 4 or 5 year OPC drought on ebay, there have been 2 fairly active ebay sellers from Canada in the past few months selling OPC puzzle pieces & stickers. I wonder if this is a sign of more to come, or if they may have some info that would be helpful. Have you noticed the auctions from BuzzzardJohn & mattawa over the past several months?
It's also funny how that "Printed in USA" wrapper had been listed on ebay for a couple of years, and went unnoticed. I know I saw it on many occasions, but didn't pay careful attention because it looked like the wrapper I had & the condition wasn't that great, so I glossed right over it. It wasn't until Matt caught the copyright that anyone realized its significance. I wonder how many other clues slipped right by unsuspecting collectors, never to be seen or noticed again? We are talking subtle differences here. When I first saw the post in this thread, I thought "What's the big deal, it's an OPC wrapper." It wasn't until I took my OPC blue wrapper out & carefully compared it to this one that I realized what I was looking at.