Automatic movement: The newly developed umf caliber 24-34-2 ensures precise and reliable timekeeping, supported by the 26 jewels and the high frequency of 28,800 / 4 hz semi-oscillations per hour, with a power reserve of approximately 36 hours. Stainless steel case with screw-down crown, 41 mm diameter, sapphire crystal and watch back 10 atm water resistant The picture of the back is only an example, we have no influence on the serial number.