1mm. Though AP marketed the watch as “Additional-Thin,” lovers ongoing to make reference to it as “Jumbo” offered its 39mm situation. Other slight adjustments bundled a switch from a white date wheel into a black Variation to 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/