Hello, I have a burning question. I have a Vacheron Constantin Overseas watch and it has a among other dials one that puzzles me the most. It is written antimagnetic on the bottom half and automatic on the top one. What does that mean? Why it moves from one to the other during the day? And on what is based it\'s movement (i mean what does it indicate)? I know what antimagnetic means but why does that dial move from antimagnetic to automatic ?