1991 o-pee-chee pack to commemorate all star game?

[mouschi]

Anyone know anything about these? The front of the pack looks like a base card, but just wondering if they did anything different to the backs of the cards.

 

[finestkind]

This member on the PSA forum knows a lot about PSA cards tsalems1.

 

[olerud363]

Wow. I've never seen that before, so I'm curious to see info comes to light.

Sent from my Android using the Freedom Cardboard app.