1mm. Although AP promoted the watch as “Excess-Thin,” lovers continued to consult with it as “Jumbo” offered its 39mm circumstance. Other slight improvements involved a switch from a white day wheel into a black Model to the blue and black dials and also the addition of the double-deployant clasp on https://www.watchesworld.com/a-guide-to-10-of-the-best-dress-watches/