U-Boat U-42 Automatic Chrono Gold Limited Edition Watch# 6473 (Men Watch). Band Color: Black. Dial Color: Black. Display Type: Chronograph. Item Shape: Round Shape. Case Size Thickness: 18.9 millimetres. Case Size Diameter: 47 millimetres. Case Material: in titanium, with subsequent treatment of IP Black coating. Watertight on axis reset and assured charge by PTFE gasket. Bi-directional rotating bezel, in titanium, lockable with a lever on the right side of the case. Fixing of revolving bezel by 3 screws encapsulated in the back case; the bezel removal, for maintenance and washing obtained by removing the three screws, does not affect the watch watertight. 12 o’clock ball indicator on the bezel made of ceramic, minutes indicators in gold 18K. Crown, chrono button, screws on the bezel, bezel release lever in rose gold, 18K, gold total weight around 15,40 gr. Bezel Material: Titanium. Bezel Function: Bi-directional. Crystal: Sapphire. Water Resistant Depth: 300 meters. Movement Type: Automatic mechanical chronograph modified and personalized at U-Boat specifications for date display and stem position at 9 o’clock. Frequency: 28.800 vibrations per hour, 4 Hz. Power Reserve: 48 hours. 25 jewels. Height: 7 mm. Calendar Type: Date. Limited Edition:99 units. Model Number: 6473 647 64 6.