1mm. Whilst AP promoted the watch as “Further-Thin,” fans ongoing to consult with it as “Jumbo” specified its 39mm case. Other slight improvements involved a swap from a white date wheel into a black Model on the blue and black dials as well as the addition of the double-deployant clasp https://www.watchesworld.com/a-guide-to-10-of-the-best-dress-watches/