Both models sport the NOMOS in-house Neomatik DUW 3001, a very thin movement which ensures an overall slim presence on wrist. Measuring just 9.6mm thick for the Ahoi, and 9.3mm for the Club, both of these watches still a manage 200 meters water resistance, have screw-down crowns, and sapphire crystals both front and back. While both the Club and the Ahoi already come in the brand's standard "white silver-plated" dial, I like the flat bright of Siren White and the use of the red and blue accents for some additional visual interest. Summer or not, the NOMOS aesthetic works so well with a bright dial color, and these new white dials offer some visual punch without getting too wild for day to day wear.