Ordered this off of eBay the other day, it's a Formula 1 chrono, model CAH1112 to be exact. So far it's amazing. One thing though, I head somewhere that when the battery needs changing, the watch will act a little weird. Well on mine, when I reset the chrono, the minute counter doesn't reset, it also doesn't move when using the stopwatch. Anyone know the problem? Is it a simple battery issue? Here's a pic of the watch by the way.