Extremely rare wrong back error 1997 Upper Deck Collector's Choice Premier Power Ken Griffey Jr #PP3 trading card featuring Mark McGwire on the front.

I have never seen one other card with the error with both of these home run hitting all-time greats!

Card does have some flaws with some

Bending on the top right corner and an indent on the upper right side.

Just won’t find an error card like this featuring Griffey Jr and McGwire! Prices accordingly with condition issues.

This sports trading card is from the Major League Baseball (MLB) and is part of the Upper Deck manufacturer's set. The card showcases Ken Griffey Jr from the Seattle Mariners in the 1997 season, highlighting a unique insert design within the Premier Power series. This collectible item is highly sought after by fans and collectors of baseball memorabilia for its rarity and association with iconic players like Griffey Jr and McGwire.