U1 SDR

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U1 SDR. U1 SDR - With the diving watch U1, Sinn engineers succeeded in developing a diving watch in which the quality of material and design gives it superior resistance to external influences under extreme c Key extracted specs: case diameter Tested based on European diving equipment standards and certified by an independent institute; thickness Weight without strap: 113 gramme; lug width : 22 mm; case material Black cowhide leather strap integrated in the case; crystal glass; water resistance and; movement SW 200-1.