1mm. Even though AP promoted the watch as “More-Thin,” admirers ongoing to check with it as “Jumbo” offered its 39mm situation. Other slight variations provided a change from a white date wheel to some black Variation over the blue and black dials and also the addition of a double-deployant clasp https://www.watchesworld.com/a-guide-to-10-of-the-best-dress-watches/