1mm. While AP promoted the watch as “Additional-Thin,” enthusiasts continued to make reference to it as “Jumbo” supplied its 39mm situation. Other slight variations provided a change from a white date wheel to the black Variation within the blue and black dials plus the addition of a double-deployant clasp on https://www.watchesworld.com/a-guide-to-10-of-the-best-dress-watches/