What was the first Super Bowl commercial preview?

It’s become a trend in recent years where companies start releasing commercials teasing as to what their Super Bowl commercial is going to be a couple weeks before the game. Of course, usually these are the worst commercials. Bud (?) has a new one this year involving Don Cheadle, Arnold Schwarzenegger and Reggie Watts. The first one I can remember is a few years back when Miller made a big deal about buying a one second super bowl commercial and aired commercials leading up to it where the guy was trying to figure out what to say. That was 2009. Anything earlier?