Sinn 103 watches are probably the most functional line of the brand the dial is designed to resemble the instruments in a cockpit that pilots rely on model 103 ti ar comes with valjoux 7750 automatic movement it performs 28 800 vibrations per hour and has 25 bearing jewels additional features include dehumidifying technology captive pilots bezel with minute ratcheting a second time zone pressure resistance and scratch resistant sapphire crystal glass with anti reflective coating on both