Watch testers determine unseeable leaks on the watch case. Bergeon is one of the foundations of the watch industry. Aside from repair tools, Bergeon offer watch testers to demonstrate the watch resistance from pressure and water. Sofly covers Bergeon 5555 waterproof tester, pulse tester, and other watch testers you may need. If you are looking for an item that is not listed below, please email us at [email protected], we will try our best to find it! Get $5 off with orders over $50 with coupon: SOFLYGO.