Red vs. Green

Earlier this month Mark's Ephemera had a fun contest where you had to guess what a bunch of cards had in common. One unexpected aspect of playing in the contest was that I noticed a little variation within 1989 Fleer.

In that set, each team had a border of the same color. For example, every Yankee had a red border:

However, for some reason, only the Oakland A's had two borders. Most cards had the A's signature green, but a few had red for some reason:

Bet you never noticed that before!