not serviced since it was bought (2018) SWISS MADE AUTOMATIC WRIST WATCH Limited Edition of 41 pieces Pioneering the use of Niobium in watches, DWISS created the model C2. With a case made of Nb1Zr (99% Niobium, 1% Zirconium), the number of watches ever produced (41) corresponds to the same atomic number of the metal itself. Niobium is a highly wear resistant (and hypoallergenic) metal that has its own unique shock absorption properties that give it an advantage over stainless steel. Dimension 41mm diameter 10.5mm thick Movement Swiss made automatic mechanical movement Caliber 2824-2 Hour, minute, second hands and date at 6 o’clock Frequency 4Hz – 28’800 Shockproof protection Incabloc Number of jewels: 25 Power reserve: approximately 42h Case Niobium case (Nb1Zr) Polished, Brushed, Satin Finishes Screw Down Crown Dial Silver dial with DWISS "mysterious" time display system Glass (crystal) Sapphire with anti-reflection Strap Genuine alligator strap. Butterfly Buckle with Push Button Clasps Water resistant 10 ATM - 100 meters