Nomos Glashutte Watch Ahoi Neomatik Signalblau Sapphire Crystal 562. The future is blue siren blue, This Ahoi is powered by automatic caliber DUW 3001, the tenth proprietary movement from NOMOS Glashutter. Ultra thin, highly precise, the perfect symbiosis between handcraft and high tech. It means this watch can tick in an entirely new size, as slender as a hand wound, in the classic diameter of 36 millimeters. Good to know, Ahoi neomatik signalblau has a license to dive. To 20 atm, so 200 meters, it stays tightly sealed, thanks to crown protection and the back fixed with six screws.