Patek Philippe

Dear all, May i ask 2 stupid questions ? 1) Is there any reason to avoid a big change of pressure in a small amount of time with a PP watch ? I assume this is not a problem as this is what happens in a plane... But I prefer to be sure (I ask because I wil... 

for q2, I read that it's recommended to ONLY go clockwise. reversing spoils something which I can't recall ATM. anyway hope more ppl post their views on tis

1/ Yes. 2/ Yes, if you avoid the " danger zone ", which is between 9 PM and let's say 4 AM. Best, Nicolas.