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SIHH 2015: IWC Portugieser Tourbillon Mystère Rétrograde

by Chester Lau on January 22, 2015

The Portugieser Tourbillon Mystère Rétrograde combines the magic of a floating tourbillon with the logic of a date hand that reverts to its starting position and the power of a 7-day in-house calibre. In 2015, this exclusive timepiece is even more attractive to look at. The Portugieser Tourbillon Hand-Wound with its delicate, flying “whirlwind” will remain a source of delight to connoisseurs of precision watchmaking.

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Ref. IW504601: case in platinum, silver-plated dial, black alligator leather strap by Santoni, folding clasp in platinum

 

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The tourbillon, which makes the “12” appear to come to life, gives the watch not only its name but also a touch of mystery.­Set­in­a­mirror-finished­ring,­it­forms­the­visualcentrepiece of the entire dial. The complication is mounted on­one­side­only­and­therefore­known­as­a­“flying”­tourbillon.­

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IWC-manufactured calibre 51900 Frequency 19,800 A/h / 2.75 Hz Jewels 44 Power reserve 7 days (168 h) Winding automatic Weight of tourbillon 0.635 g

To mark the 75th anniversary of the Portugieser watch family, IWC has given the Portugieser Tourbillon Mystère Rétrograde (Ref. 5046) an additional touch of luxury. The new arched-edge front glass makes the watch appear both slimmer and more elegant. The horns have also been ergonomically optimized to make the watch more comfortable to wear on a slimmer wrist. Another new feature is the exclusive­alligator­leather­strap­by­Santoni:­a­fitting­accessory for the Portugieser Tourbillon Mystère Rétrograde. The dial of the platinum version is silver plated while the red gold­model ­is ­fitted­ with ­a ­slate-coloured ­dial.­The ­reverse side of the watch with its see-through sapphire-glass back is also more attractive. The narrower and partly perforated solid red gold rotor with its “Probus Scafusia” relief engraving provides a generous view of the IWC-manufactured 51900 calibre.

This ­creates ­the ­illusion ­that ­the­ balance ­is­ floating ­in ­midair against the deep black background but also allows us to see the “whirlwind”, as its name translates literally, at work.­Originally,­the ­tourbillon­was­ designed­ for­ use ­in pocket watches, where it offset the gravitational error inevitable in an oscillating system with a balance and spring, and the resulting deviation in rate. To achieve this, the balance, pallet and escape wheel are mounted in a tiny cage that rotates around its own axis once every minute. This ­filigree ­work ­of­art­ consists­ of­82 ­parts ­and ­weighs 0.635 grams: a masterpiece of haute horlogerie, made in Schaffhausen.

 

FEATURES
Mechanical movement – Pellaton automatic winding – Power reserve display – Retrograde date display – Flying minute tourbillon – Glucydur®* beryllium alloy balance with high-precision adjustment cams on balance arms – Breguet spring – See-through sapphire-glass back – Rotor made of 18-carat red gold

MOVEMENT
IWC-manufactured calibre 51900 Frequency 19,800 A/h / 2.75 Hz Jewels 44 Power reserve 7 days (168 h) Winding automatic Weight of tourbillon 0.635 g

WATCH
Materials Ref. IW504601: case in platinum, silver-plated dial, black alligator leather strap by Santoni, folding clasp in platinum

Ref. IW504602: case in 18-carat red gold, slate-coloured dial, dark brown alligator leather strap by Santoni, folding clasp in 18-carat red gold

Glass­ sapphire,­arched­edge,­antireflective ­coating ­on ­both ­sides

Water-resistant 3 bar

Diameter 44.2 mm Case height 15.3 mm

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