Friday, September 19, 2014

A. Lange & Söhne – RICHARD LANGE - Perpetual Calendar “Terraluna” History


A. Lange & SöhneRICHARD LANGE - Perpetual Calendar TerralunaHistory

A breath of history
The RICHARD LANGE PERPETUAL CALENDAR “Terraluna” and its historic role model
 
There are timepieces whose fascination persists for centuries. Chronometer No.93 crafted by Dresden watchmaker Johann Heinrich Seyffert in 1807 is one of them. His unusual regulator dial inspired the design of the RICHARD LANGE PERPETUAL CALENDAR “Terraluna.

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Three rings in a pyramid-shaped arrangement characterise the prominent regulator dial of the RICHARD LANGE PERPETUAL CALENDAR “Terraluna. The striking design with a separate display for each unit of time dates back to a historic role model: the gold pocket watch No. 93 from the workshop of eminent Saxon watchmaker Johann Heinrich Seyffert.

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The three overlapping circles on its enamel dial indicate the minutes at the top as well as the hours and seconds at the bottom. Today, the watch is on display at the Mathematics and Physics Salon, where Seyffert worked as an inspector from 1801 until 1817.

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At the time, Seyffert was one of the most notable protagonists of precision watchmaking in Saxony. With his achievements and inventions in the domain of chronometry, he deserves credit for furthering an evolution that culminated in the establishment of the first Glashütte watchmaking company by Ferdinand A. Lange in 1845. Apart from members of the Saxon court, his customers also included the likes of Alexander von Humboldt, who relied on a Seyffert pocket chronometer during his noteworthy expedition to South America.

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What the RICHARD LANGE PERPETUAL CALENDAR “Terraluna shares with Seyffert’s approach to horology is the quest for the ultimate in precision. Technically, it explores new dimensions.

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The precisely-jumping displays of its perpetual calendar are integrated into the dial just as harmoniously as the power-reserve indicator and the first Lange outsize date to be featured in a model of the Richard Lange watch family. The movement side is no less spectacular than the dial.

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There, the patented orbital moon-phase display tracks the position of the moon relative to the earth and the sun.

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Contact information for the media
Arnd Einhorn, Director Press and PR
* Tel.: +49 (0)35053 44 5505
* E-mail: presse@lange-soehne.com
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ARNOLD & SON – TE8 Tourbillon

















ARNOLD & SONRoyal Collection TE8 Tourbillon Limited Edition NEW

Timeless elegance, handcraft and innovative technology:
Arnold & Son’s TE8
Tourbillon

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True to English watchmaking heritage, Arnold & Son unveils two new references of its TE8 Tourbillon, with the hand-finished A&S8000 calibre. This defining timepiece heralds in the Royal Collection that combines classic styling with leading-edge technology.

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TE8 
Exclusive Arnold & Son tourbillon movement A&S8000, hand-wound, black open dial,
18-carat white gold case, diameter 44 mm
© Arnold & Son

The tourbillon is one of the most elegant and inspired complications in the history of watchmaking. As simple in principle as it is difficult to make, the mechanism was designed to eliminate the errors of rate caused by gravity on a pocket watch carried in a vertical position.

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Weighing mere fractions of a gram, it consists of a mobile cage that contains all the parts of the escapement, with the balance at the centre. The cage completes one revolution around its own axis every minute, thus ensuring that the balance wheel oscillates at different positions in the course of its 360° journey and that the rate remains as constant as possible.

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TE8
Exclusive Arnold & Son tourbillon movement A&S8000, hand-wound, anthracite open dial,
18-carat red gold case, diameter 44 mm

© Arnold & Son

The TE8 Tourbillon heralds the Royal Collection that combines classical styling with innovative, state-of-the-art technology. The letters “TE” stand for tourbillon escapement. Some of its more distinctive features are obvious at first glance. Compared with other more conventional tourbillons found today, the TE8’s movement is said to be “inverted”: in other words, most of the technical elements and visually interesting features can be seen on the dial side, when they would normally be hidden away on the reverse.

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The timepiece also boasts a number of typically English technical idiosyncrasies that will interest even the most discerning watch connoisseur. Take the symmetrical layout of the movement, for instance: the barrel spring and the tourbillon cage are centred along the watch’s longitudinal axis. The main jewels are hold by screwed gold chatons. They are a reminiscence of the finest Haute Horlogerie mechanical watches of the good old days and contribute to the beauty of the movement.

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TE8
Exclusive Arnold & Son tourbillon movement A&S8000, hand-wound, anthracite open dial,
18-carat whitegold case, diameter 44 mm

© Arnold & Son

In addition to their esthetical appeal, gold chatons also allow to replace damaged jewels without modifying the boreholes in the plates and bridges. A closer examination of the winding system and the gear train reveals a traditional construction used in high-end pocket watches that involves the use of “wolf-teeth”, an asymmetrical tooth system featuring both long and narrow spokes used primarily to improve the smoothness of the overall movement and to enhance its elegant design.

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From an aesthetic point of view, however, the feature that sets Arnold & Son’s TE8 Tourbillon apart is its singularly English design. Some of the more obvious elements include the meticulously positioned three-quarter barrel bridge with its large wave-shaped cut-out and a lavish decoration unique to Arnold & Son, the triangular tourbillon and motion-work bridges, and the three-spoke design of the wheels, which are shaped with such distinctive flair.

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Needless to say, every detail of this striking piece, such as the black and brushed polishing, bevelling and movement decoration, is painstakingly hand-finished by Arnold & Son’s master watchmakers.

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A&S8000
© Arnold & Son

This unique tourbillon timepiece will be produced in a limited edition of 25 pieces of each version, in a 44 mm 18-carat white gold and 18-carat red gold case with either a movement with NAC grey treated bridges and black ruthenium treated main plate or rhodium treated bridges and NAC grey treated main plate. Each watch case is individually numbered and engraved.

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Technical Characteristics

References: 1SJAR.G01A.C112A 18-carat Red Gold Case
References: 1SJAW.B02A.C113A 18-carat White Gold Case

Calibre:                                  
A&S8000
Exclusive Arnold & Son mechanical movement tourbillon movement,
Hand-wound, 19 jewels, diameter 32.6 mm, thickness 6.25 mm,
Power reserve 80 h, 21,600 vibrations/h
Functions:
Hours, minutes, tourbillon
Movement decoration:
  • 18-carat white gold case model:
nickel-silver movement, NAC grey treated bridges and black ruthenium
treated main plate with superlative Haute Horlogerie finishing: hand-
chamfered bridges with polished edges, fine circular graining and A&S
specific waves decoration, circular satin-finished wheels with hand-
chamfered and polished edges, screwed gold chatons, mirror-polished
tourbillon cage and bridge, screws with bevelled and mirror-polished heads
  • 18-carat red gold case model:
nickel-silver movement, rhodium treated bridges and NAC grey treated
main plate with superlative Haute Horlogerie finishing: hand-chamfered
bridges with polished edges, fine circular graining and A&S specific waves
decoration, circular satin-finished wheels with hand-chamfered and
polished edges, screwed gold chatons, mirror-polished tourbillon cage and
bridge, screws with bevelled and mirror-polished heads

Dial:  
Black or anthracite open dial
Case:   
18-carat white gold or 18-carat red gold, diameter 44 mm,
Cambered sapphire with anti-reflective coating on both sides,
Case back see-through sapphire,
Water-resistant to 30 m
Strap:
Hand-stitched black or brown alligator leather
Water resistance:
30 Meters
Limited edition: 25 timepieces

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 ARNOLD & SON SA
Marketing & Sales
Boulevard des Eplatures 38
CH – 2300 La Chaux-de-Fonds
Switzerland
info@arnoldandson.com
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