1mm. Though AP promoted the watch as “Excess-Thin,” enthusiasts continued to seek advice from it as “Jumbo” provided its 39mm scenario. Other slight adjustments provided a change from a white day wheel to a black Variation within the blue and black dials as well as addition of the double-deployant clasp https://www.watchesworld.com/a-guide-to-10-of-the-best-dress-watches/