VK64 quartz movement with chronograp (up to 60 minutes) and instant reset function from Seiko Instruments Inc. Stainless steel case, 39 mm diameter, 13.5 mm thickness 200M / 20 atm of water resistance Unidirectional rotating bezel with diver's scale Every Undinwatch comes with two different leather straps, silicone strap available to order extra Special spring bars installed to the straps allow to replace straps just by fingerswithout any tools Whole watch set is packed to VE Gift box especially designed for the Undine watch line