1mm. When AP marketed the watch as “More-Thin,” admirers ongoing to refer to it as “Jumbo” provided its 39mm circumstance. Other slight changes involved a change from a white day wheel to some black version around the blue and black dials as well as addition of the double-deployant clasp on https://www.watchesworld.com/a-guide-to-10-of-the-best-dress-watches/