1mm. Even though AP promoted the watch as “Additional-Thin,” admirers continued to seek advice from it as “Jumbo” offered its 39mm situation. Other slight modifications included a switch from a white date wheel into a black Variation on the blue and black dials and the addition of a double-deployant clasp https://www.watchesworld.com/a-guide-to-10-of-the-best-dress-watches/