1mm. While AP marketed the watch as “More-Thin,” followers continued to seek advice from it as “Jumbo” offered its 39mm case. Other slight alterations included a change from a white date wheel to your black Variation to the blue and black dials and also the addition of the double-deployant clasp https://www.watchesworld.com/a-guide-to-10-of-the-best-dress-watches/