Bergeon Waterproof Watch Pressure Tester. This is a new Bergeon water proof watch pressure tester. This tests the water resistance of watch cases under normal conditions of wear. Pressure gauge has a range of 0-3 atmospheres. Has a capacity of 2 watches. The diameter of the opening measures 2" (50 mm). It measures approximately 9 5/8" x 5 7/8" x 12 3/16" (244 x 150 x 310 mm).