is powered by the cal. 9051 that has 42-hour power reserve and runs within -10 to +20 seconds a day.
One feature both movements have in common is magnetism resistance. They conform to JIS B7024, the Japan Industrial Standards requirement for “magnetic-resistant portable watch”, which is magnetism resistance to 16,000 A/m. That’s about three times the magnetism resistance of conventional mechanical watches that are typically rated to 4,800 A/m. It’s also sufficient to withstand the magnetic fields generated by everyday electronic devices like smartphones and tablets.