1mm. Whilst AP marketed the watch as “Further-Thin,” fans continued to seek advice from it as “Jumbo” offered its 39mm scenario. Other slight alterations included a swap from a white date wheel into a black Edition 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/