Portugieser Perpetual Calendar Double Moon Platinum / Silver

In Context

At 44.2 mm it is a large watch — well above this catalogue’s 40 mm median, and enough to dominate a narrow wrist. At 15.3 mm it is a tall case, and it will catch on a cuff. 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. Rated to 30 m, it is protected against rain and splashes and nothing beyond that.

The movement winds itself from the motion of your wrist. 168 hours of reserve puts it well past a weekend — several days off the wrist and it is still going. At 28,800 vph the seconds hand advances 8 times a second.

IW5034-06 is one of 4 executions of the IW5034 base reference. Underneath they are the same watch; what separates this one is a silver dial and a platinum case. It was a limited edition. Beyond the time it carries a perpetual calendar.

The 52615 is IWC's seven-day perpetual calendar of the 52000 generation, introduced in 2015. It has two barrels, a beat of 28,800 vph and ceramic winding pawls. It powers 16 watches in this library. The 51000 family held its week in one barrel at 21,600 vph; the 52000 stores it in two, which frees the balance to run at 28,800 without shortening the 168 hours. The Pellaton winding system's pawls are ceramic against wear, the rotor carries an 18-carat gold medallion, and Kurt Klaus's perpetual calendar sits on top with its four-digit year and double moon phase, all set from the crown; the movement has 54 jewels at 38.2 mm across. The [Pellaton piece](/blog/iwc-pellaton-winding) explains the generation. In the library it powers 12 [Big Pilot](/brands/iwc/big-pilot) Perpetual Calendar references at 46.2 mm and 46.5 mm and 4 [Portugieser](/brands/iwc/portugieser) Perpetual Calendar Double Moon 5034s at 44.2 mm. 7 are limited editions. The [51614](/calibers/iwc-51614) is the single-barrel perpetual calendar it replaced, the [52010](/calibers/iwc-52010) the same base with a date alone, and the glossary defines the [perpetual calendar](/glossary/perpetual-calendar).

15 other watches in the library run the IWC 52615.

IWC

Big Pilot's Watch Perpetual Calendar Platinum / Yellow

IW503602 · 46.2 mm

IWC

Big Pilot's Watch Perpetual Calendar Top Gun Edition 'Rodeo Drive'

IW5030-01 · 46.5 mm

IWC

Big Pilot's Watch Perpetual Calendar Stainless Steel / Blue

IW5036-05 · 46.2 mm

IWC

Big Pilot's Watch Perpetual Calendar Toto Wolff x Mercedes-AMG Petronas Formula One Team

IW5036-07 · 46.2 mm