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Posts Tagged ‘Perpetual

Audemars Piguet Jules Audemars Perpetual Calendar

 

In 2008, the watchmakers in Le Brassus paid tribute to the first perpetual calendar by creating a platinum limited series to mark its 30th anniversary. 

 

Today, the Jules Audemars Perpetual Calendar is making its grand entrance into the collection with an 18kt rose gold case, teamed according to personal preference with a brown or silvered dial. The latter features a satin-brushed sunburst finish and refined rose gold hour-markers. Its case echoes the identity codes developed in 2008 with a particularly slender bezel designed to highlight the dial. 

 

The perpetual calendar mechanism admirably reproduces the specific features of our Gregorian calendar, taking into account the irregular lengths of the 30- and 31-day months by means of a cam – itself connected to a wheel – bearing the different monthly durations. 

 

Another wheel on the same axis, which carries a cam indicating a normal month of February and a leap-year February, performs one full revolution in four years and thus enables the watch to keep track of the leap-year cycle. This means the Jules Audemars Perpetual Calendar will not require any correction until March 1st 2100. All that will be required on this date is to activate the correctors placed on the side of the case, and the mechanism will be duly readjusted for another century. This module, built on the extra-thin self-winding Calibre 2120 base movement, was and still is – after successive enhancements – an impressive technical accomplishment and a prodigious feat of miniaturisation. 

References 26390OR.OO.D088CR.01 Silver Dial and 26390OR.OO.D093CR.01 Brown Dial

The case, in 18kt rose gold, measures 41mm x 9mm, with a sapphire crystal and display back, and water resistance to 20 meters.

Movement is the ultra-thin (4mm) Swiss automatic AP caliber 2120/2802 with 355 parts, 38 jewels, 19,800 vph and a power reserve of 40 hours. Finishing: circular-grained mainplate, bridges circular-grained and adorned with Cotes de Geneva motif, polished angles.

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Written by kevin

November 6, 2010 at 11:59 pm

Girard-Perregaux 1966 Perpetual Calendar

Limited Edition of 99 Pieces Each 

 

Girard-Perregaux has unveiled a Perpetual Calendar as part of its Girard-Perregaux 1966 collection, the clean, understated style of this watchmaking classic paying fitting tribute to the Brand’s long-standing tradition.

Named in honour of the Neuchâtel Observatory’s Centenary Prize, awarded to the Manufacture in 1966 for its achievements in the field of chronometry, the Girard-Perregaux 1966 collection embodies the Brand’s expertise both in terms of technical performance and style.

A highly complex mechanism, the Perpetual Calendar indicates the date, day and month, taking into account the different lengths of the months in the Gregorian calendar, including leap years. Its “mechanical memory” therefore counts 1461 days, or four years. A superb example of technical watchmaking, the self-winding calibre GP033Q0 comprises 288 separate components. In a further touch of sophistication, the calibre features the Manufacture’s exclusive Microvar variable inertia balance, which can be seen through the watch’s transparent case-back.

This exceptional calibre is housed in an elegant 40-millimetre case. With its beautiful symmetry and perfect attention to detail, the Girard-Perregaux 1966 Perpetual Calendar exceeds the most demanding expectations in terms of watch design. On its gently domed dial, baton indexes and fine hands mark the hours, minutes and the different calendar indications.

To emphasise the model’s personality and improve its readability, the date, day and month are indicated by small blued steel hands, with the moon phases displayed in a window at 6 o’clock.

Technical Specifications

Case in 18kt rose or white gold, measuring 40mm x 10.7mm. It has an AR-coated sapphire crystal, a sapphire display back, and is water resistant to 30 meters. 

Movement is the Swiss automatic in-house GP caliber GP033Q0 with 26 jewels, 28,800 vph and a power reserve of 46 hours. Functions are: hours, minutes, perpetual calendar and moon phases indicator. It features a Microvar balance with variable inertia.

Girard-Perregaux Microvar Variable Inertia Balance 

The result of Girard-Perregaux’s chronometric research, the Microvar balance features six adjustable screws and two balance weights on its rim, used respectively to set the balance’s equilibrium and enable fine adjustment of the movement. This exclusive development ensures increased precision and more stable adjustment.

Microvar balance – Glucydur balance wheel:
6 external gold screws for setting the balance’s equilibrium and general setting of the rate
2 Glucydur balance weights for fine rate adjustments (+/- 40 seconds per day)
1 eccentric for fine adjustment of the guide mark

The strap is alligator, with an ardillon buckle done in 18kt gold matching the case color.

Written by kevin

September 2, 2010 at 10:45 am

IWC Big Pilot Perpetual Calendar Limited Edition

Yellow Boutique – Limited Edition of 250 Pieces

The stainless steel case measures 46mm. It has an AR-coated sapphire crystal and is water resistant to 100 meters.

Movement is the in-house, IWC caliber 51612 with 64 jewels, 28,800 vph and a power reserve of 7 days. It features the Pellaton winding system.

MSRP is $28,000 and is only available at select IWC boutiques.

Written by kevin

August 14, 2010 at 2:42 am