1mm. Whilst AP promoted the watch as “Additional-Thin,” admirers continued to consult with it as “Jumbo” offered its 39mm case. Other slight adjustments integrated a switch from a white date wheel to the black version about the blue and black dials as well as the addition of a double-deployant clasp https://www.watchesworld.com/a-guide-to-10-of-the-best-dress-watches/