So i have a Guess water resistant (25m) watch, which has recently stopped ticking. Took it to a shop, and they tested the battery which was flat. He didn't open it as he explained to keep it water resistant the seal has to be kept, and therefore to replace the battery it would need to be sent back to the manufacturer. I then took it to HSamuel where i got it from to ask about changing the battery / replacing it. She to my disbelief opened up the watch and confirmed the battery had gone.
Has she by doing this broke the seal and made the watch non water resistant?