1mm. Though AP marketed the watch as “Extra-Thin,” fans continued to seek advice from it as “Jumbo” presented its 39mm circumstance. Other slight adjustments involved a switch from a white day wheel into a black version about 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/