
Beyond the standard hour, minute, and seconds indicators, the 3187 includes a 24-hour hand for tracking a secondary time zone. Equipped with a Parachrom hairspring and Paraflex shock absorbers, it provides enhanced durability against impacts and harsh environments. As a Rolex Perpetual movement, it is a certified Swiss chronometer, having met the rigorous standards of the Swiss Official Chronometer Testing Institute (COSC), and shares the inherently reliable architecture of all Oyster movements.