Nomos Glashutte Watch Tangente Neomatik 41 Update Ruthenium Sapphire Crystal 181. The successful model Tangente Update is now available in an entirely new colorway. This dashing new dial is enhanced with ruthenium, a member of the platinum group and a very rare element. The result is a highly elegant and very sophisticated timepiece. The date ring that circumscribes the dial bears two contrasting red markings that frame the current date, a design that is exclusive to NOMOS Glashutte watches.