Back in the days of Mark One, one of the prizes you received for winning a Tournament was Gold Bordered cards for the list you used to win. It was quite a nice little bonus. You would always have a reminder of your Tournament victory. Many people would vary their lists after winning to try to get more gold cards for models and units that they didn't have one for yet. You could always tell who were the people you had to watch out for at Tournaments played with people you didn't normally play against, because they had gold cards.
I sure do miss those days. I still have a little packet of my gold cards in my box of unassembled figures that I look at when I'm building new models.