Aquatimer Perpetual Calendar Digital Date-Month Titanium / Red Gold / Blue

In Context

At 49 mm this is exceptionally large for something worn on a wrist, closer to a pocket watch given lugs. At 19 mm it is very tall, and sits high off the wrist. The case back is open, so the movement is visible without taking the watch apart, and the sapphire crystal will resist everything short of deliberate abuse. 100 m is genuine swimming resistance — more than the shape of this watch suggests it would need.

The movement winds itself from the motion of your wrist. 68 hours of reserve is enough to set it down on Friday evening and find it still running on Monday. At 28,800 vph the seconds hand advances 8 times a second.

IW379402 stands on its own in this catalogue — no other reference here shares its base number. It pairs a blue dial with a titanium, red gold case. Beyond the time it carries a perpetual calendar.

Mechanical chronograph movement, stopwatch function with hours, minutes and seconds, hour and minute counters combined in a totalizer at 12 o'clock, flyback function, small hacking seconds, perpetual calendar, large double-digit display for both the date and month, leap year display.

9 other watches in the library run the IWC 89801.

IWC

Portugieser Perpetual Calendar Digital Date-Month Edition "75th Anniversary" Red Gold / Blue

IW3972-04 · 45 mm

IWC

Portugieser Perpetual Calendar Digital Date-Month Edition "75th Anniversary" Red Gold / Black

IW3972-02 · 45 mm

IWC

Portugieser Perpetual Calendar Digital Date-Month Edition "75th Anniversary" Platinum

IW3972-01 · 45 mm

IWC

Pilot's Watch Spitfire Perpetual Calendar Digital Date-Month Stainless Steel

IW3791-07 · 46 mm