Wow, interesting fact about the ad card! This ad card is a "Play by the rules" and on the bottom left is printed 138-0400-P. So, it looks like it's at least from 2000, right? I found it weird I can't find a Print Code Dating Table that indicates the "B" letter was used after 1996. Did USPCC use random print codes here and there without big runs? At any rate, the cards handle gorgeously. definitely worth the $8 lol.
But, I've stumbled upon a mystery that I've spent countless time trying to figure out. I have one Red blue seal deck that has a tuck box unlike any other blue seal I own, which arent many, but it's still odd. The colors are different, and the UPC is on the left side of the bottom when looking at the tuck from the front. The font is differen, the cellophane is super loose, and the outer part of the blue seal is more faded then the others. The "spade" logo on the front is different overall, but most noticeably the stars are smaller. At first I thought it could be a long flap, but I found a post on the site that said long flap tucks have glued seams on both sides, which this one does not. I'm also thinking it could be a knock off, which still I wouldn't be too upset with as it would be cool to have that in my collection.
A friend I chat with through Discord took pictures of all his Blue Seals, and nothing compares to his either - long flap or otherwise. I'm close to just opening the darn thing out of the burning frustration I've run into! Lol. I'm from Long Island NY, and spending a couple weeks in the summer there, so I was even planning to take the deck to some magic shops along the way hoping for more info, like Tannens or something. Here's a couple pics, and maybe you have some insight Don? I'd really appreciate it. I've exhausted my research capabilities. In all photos the deck in question will be on the right, with a comparison Blue seal on the left. The deck on the left is identical to the deck I originally asked about in the post, and every other deck I've found thus far. Thank you so much, Don.
Edit: I'm on my iPad and took 5 photos but the images exceed 1000mb. I'm going to have to take pictures another way and I'll upload immediately in another response