OBSERVATORY GRAND COMPLICATION

REBORN & REIMAGINED: OUR ICONIC MARINE CHRONOMETER

OBSERVATORY GRAND COMPLICATION
 

SIMPLY, A UNIQUE MULTI-COMPLICATED TIMEPIECE

Paying homage to the classic 1980s Observatory, this upgraded version follows three years of research, development, design and execution.

The chronometer features fifteen complications, including a rare flying detent tourbillon and double fusee-and-chain transmission. Extensively grained and inlaid with precious woods, the elegant case holds a distinctive dial displaying hours, minutes and seconds in separate sub-dials.

 

 

The pinnacle of worldwide marine timekeeping

Hours. Minutes. Seconds. Time seems a straightforward concept. Yet recording the passage of time is not, as a glance at this chronometer’s 15 complications will confirm.

The chronometer’s measurement of time is achieved using a rare detent escapement, Thomas Mercer’s signature technology for almost a century. Its unparalleled accuracy and reliability is the result of very low energy consumption, low friction and lightness. To fulfill the need for worldwide accuracy, the timepiece also features a 24-world location, 24-time zone disc. At any given moment, anywhere in the world, it tells the local time.

 

design and unique features

A WORK OF ART. A MODEL OF ACCURACY

The chronometer’s case is as refined and sophisticated as its mechanism. A stainless steel base is the foundation for a series of pillars that carry the actual mechanism. The base and columns are inlaid with Santos Rosewood and South American Ziricote, two species of rare exotic hardwoods. Above the ultra-complex movement, the dial features a pair of large, hand-made blue-steel hands and glasses made of extra-white crystal.

 

 

MATERIAL

The case is crafted from Ziricote and Santos Rosewood and hand-polished stainless steel.

 

FINISHING

The solid brass dial has rhodium and 4N gold electroplating with gold-plated Indexes.

 

SUSPENSION

The Observatory Grand Complication features double gimbals, counterbalance free and double lock.

 

GLASSES

The marine chronometer’s glasses are extra-white crystal and rock crystal.

 
 

Mechanism

CALIBRE TM3001

Meeting the highest standards of the horological craft, each of the 1680 brass and steel components has been meticulously manufactured, plated and bevelled. Depending on its position and function within the mechanism, each wheel, gear, lever, spring or screw has either been finished with Geneva stripes, circular graining, straight graining or polished. The mechanism is visible under any angle, without distortion.

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POWER RESERVE

30 days

 

ESCAPEMENT

Flying Detent-Tourbillon with double fusee-and-chain drive

 

MAIN FUNCTIONS

Perpetual Calendar, Equation of Time, 24 Time Zones

 

DIMENSIONS

Diameter: 307mm
Height: 120mm

 
 

Technical Data

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Case

MaterialAISI 316 stainless steel
FinishHand Polished
Suspension Double gimbals, counterbalance free
GlassesExtra-white Crystal and Rock Crystal
DimensionsBase diameter: 550mm
Top ring diameter: 468mm
Height: 330mm

Dial

MaterialSolid Brass
FinishRhodium and 4N Gold electroplating, dial mask featuring grené technique and Gold plated Indexes
SettingZiricote, Santos Rosewood, Lapis-Lazuli and Mother of Pearl
HandsBlued Steel, hand made

Wooden Column

Main TimberZiricote and Santos Rosewood
FinishA/C lacquer 70% sheen, full grain finish, burnished

Mechanism

CalibreTM3001
Power Reserve30 days
EscapementFlying Detent Tourbillon
Oscillator Bimetallic balance with cylindrical weights
DriveMechanical spring with Double Fusee and Steel chain system
Frequency14.400 bph
Jewels56
Functions and IndicationsPerpetual Calendar with Equation of Time, Hour, Minute, Second, Jumping 24 Time Zones, Power Reserve Indicator, 24 Hour Day and Night Indication, Outsize Year and Leap Year, Moon Phase and Moon Age, Zodiac, Day of the Week, Day of the Month, Month
WindingRemote on bezel
SettingRemote on bezel
Start and stopRemote on bezel
FinishRhodium and 4N Gold plated
Cotes de Genève, Anglage, Perlage and Cerclage
DimensionsDiameter: 307mm
Height: 120mm
 

“Thomas Mercer’s vision is to redefine the marine chronometer for the yachtsmen of the 21st century, combining mechanical perfection with superb design and innovation. As the world’s most complicated marine chronometer, the Observatory represents the brand’s pinnacle of know-how and pushes even further the boundaries of nautical timekeeping.”

ALESSANDRO QUINTAVALLE
CEO, THOMAS MERCER

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