The digital perpetual calendar is one of IWC’s most outstanding technological advances. With the new Portugieser Perpetual Calendar Digital Date-Month “75th Anniversary” edition ref. IW397201 just released at the SIHH 2015, the Portugieser watch family now includes a model featuring a digital display for the date and month. This exclusive timepiece packs a wealth of IWC watchmaking expertise into its 45 mm case. Equipped with a perpetual calendar, digital large date display, leap year display, chronograph with flyback function and the IWC in-house calibre 89801 calibre with its efficient double-pawl winding mechanism and quick-action switch. This calibre provides a power reserve of 68 hours when fully wound and is fitted with 51 jewels and solid gold oscillating weight.

Every night, when the date display moves forward, the switch siphons off a little of the energy, stores it and then discharges it precisely at the end of the month or year when, in addition to the date and month disc, the leap year disc also needs to be advanced.

The perpetual calendar can be set easily using the crown and will not require correction until 2100. On the occasion of its relaunch to mark the 75th anniversary of the Portugieser family, the watch is fitted with an arched-edge front glass and Santoni alligator leather strap and has an attractive new calibre design.

The watch is limited to 25 pieces in platinum and 75 pieces each in 18K red gold with either a black or silver-plated dial.

On the wrist, the watch wears true to its size and quite comfortably. Its elegance taps into the true essence of the Portuguese line launched in 1930 but with the horological advancements of the modern horology.

Sticker Price $51,400 USD. For more info on IWC Schaffhausen click here.