Rolex 3230

Rolex's no-date automatic caliber featuring the Chronergy escapement, paramagnetic blue Parachrom hairspring, and Paraflex shock absorbers. The Chronergy escapement is constructed from nickel-phosphorus via LIGA technology, making it completely antimagnetic and 15% more efficient than conventional Swiss lever escapements. Powers the Explorer and Oyster Perpetual models with a 70-hour power reserve and Superlative Chronometer certification of -2/+2 seconds per day.