no need to worry; i wear mine on a regular basis in warm and humid conditions and no problem; obviously do not gon for a swim in the ocean but otherwise very reliable and a beautiful timepiece
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...