Right from the very earliest days of marine navigation, a precision timekeeper on the bridge of every ship has been essential to survival. The first examples were extremely accurate marine chronometers - or deck watches - with cardan suspension, housed in mahogany cases. Today, the Portuguese Regulateur with its sapphire back cover from IWC would master the task effortlessly and no less stylishly. It is equipped with 98245-calibre pocket watch movement, which, as its name implies, is based on the 98 calibre, a design that has been continuously developed over the past 70 years. The three separate time displays are dominated by a slim, central swallow-style minute hand. The hour hand and display are found in a subdial at 12 o'clock, the seconds hand directly opposite at 6 o'clock. With the case measuring a stately 43.1 millimetres in diameter, this generously sized watch is available in platinum in a limited edition of 500 pieces. The 18 ct. rose gold and stainless steel versions are not limited editions.