These packs are from a 1989 spring printing and are unlikely to contain any early errors, such as the Billy Ripken FF card (case code is 91001). However, 1989 was, of course, the rookie year for Ken Griffey Jr. and 3 fellow Hall of Famers - Randy Johnson, Craig Biggio and John Smoltz.
Each pack has 15 cards and 1 team sticker. The packs are from a box from a sealed case which I opened in the past few months. They are guaranteed to be intact and untampered with.