1mm. Even though AP promoted the watch as “Extra-Thin,” lovers continued to confer with it as “Jumbo” specified its 39mm situation. Other slight adjustments integrated a change from a white day wheel to the black Variation within the blue and black dials plus the addition of the double-deployant clasp on https://www.watchesworld.com/a-guide-to-10-of-the-best-dress-watches/