1mm. Although AP marketed the watch as “Additional-Thin,” fans continued to make reference to it as “Jumbo” supplied its 39mm circumstance. Other slight alterations provided a change from a white day wheel to some black version within the blue and black dials along with the addition of a double-deployant clasp https://www.watchesworld.com/a-guide-to-10-of-the-best-dress-watches/