Genuine Rolex® balance adjust screw, fits Rolex® 600, Rolex® 620, Rolex® 630, Rolex® 635, Rolex® 640, Rolex® 645 gold and silver testers 4mm has an outer diameter

4mm has an outer diameter of 8mm

70 mm and a casing diameter of 23

All drills have straight shanks and are perfectly finished to assure quick

1/100th seconds recorder

the remainder of the functions are displayed digitally

Genuine Rolex® balance adjust screw, fits Rolex® 600, Rolex® 620, Rolex® 630, Rolex® 635, Rolex® 640, Rolex® 645 gold and silver testers 4mm has an outer diameterGenuine Rolex balance adjust screw, part 3538, Fits calibres: Rolex 600 Rolex 620 Rolex 630 Rolex 635 Rolex 640 Rolex 645 * Perrin Supply Ltd is independent of and not affiliated with or sponsored by Rolex. Rolex warranty does not apply to parts supplied by Perrin Supply Ltd.