Sinn watch 356 sa pilot rubber we have made sophisticated refinements to the models in our 356 series which are designated by the suffix sa the tastefully dimensioned case with a diameter of 385 mm has a fine satinized finish and gives an impression of high quality elegant functionality connoisseurs will immediately notice another subtle detail the high domed sapphire crystal glass used in the series has the same profile as the acrylic glass in the basic model this sophistication has its