We also offer battery service for all fine Swiss watches. Battery service requires testing for water resistance to original factory specifications. This is done by Mel, our Swiss-trained watchmaker, using the latest Swiss-made equipment under air pressure to assure water resistance to the depth originally specified by the factory. And each watch model is unique. Mel provides a "watertightness test" printout showing our water enthusiasts that they are free to dive, swim and play within factory standards again. Beware of inexpensive offers to test your watch without the proper training and equipment. Mel does all battery service to the same standards as any factory in Switzerland without the cost of a plane ticket.