SI2  Sinn 556i. Reference 556.I.B. Watch measures a perfect 38.5mm and is made from steel. Automatic movement by ETA. BLUE dial. Sapphire crystals on both sides of the case. Waterproof 20ATM or 200 meters (suitable for swimming and diving). Functions are hours, minutes and sweep seconds. This watch is fitted with the original steel full length steel bracelet with integrated folding clasp with security link. Naturally this watch is complete with the original box and papers dated June 2018. Please be aware that this watch has just been serviced and polished by our watchmaker and is in mint condition. Rare to find with the beautiful blue dial!