Patek Philippe

Question - the 3939 and indeed all the minute-repeaters are only humidity proof as opposed to the others which are up to 30m waterproof. Exactly how practical and user friendly does this make it? eg, does one have to remove watch everytime wash hands just... 

in terms of size, in my opinion, just perfect fit !!...  

And in the last photo, is that 2 pieces of the same watch?! Or is it case variation ( WG & Pt)? Cheers and wow i must say i envy you alot! Stephen