CLASSIS

A seagoing timepiece and an objet’art

CLASSIS
 

BRITISH DESIGN, CRAFT AND COLLABORATION

Our founder had a sailmaker father and a watchmaker grandfather. In keeping with this dual heritage, the Thomas Mercer Classis combines the nautical and the horological.

The first Thomas Mercer chronometer of the 21st century is a collaboration between clock-maker and yacht-designer. An innovative gimbals suspension keeps the movement horizontal at sea, upholding Thomas Mercer’s longstanding reputation for precise accuracy. Renowned superyacht designer Andrew Winch created the case, commissioning cabinet-maker David Linley to craft the ebony and makassar body featuring intricate marquetry.

 

DESIGN AND UNIQUE FEATURES

CELEBRATING HOROLOGY, YACHT DESIGN & CABINET- MAKING

In a Limited Edition of 10, the Classis takes its form from the shape of a traditional winch. Its technical sophistication is on show, as the mechanism is visible through the dial. The winding key, however, is hidden in a drawer inset into the makassar ebony panel. On the case, satinwood panels feature the names of 12 ships made famous by legendary voyages of discovery. Images of the ships are engraved on the pedestal base.

MATERIAL

The stainless steel case incorporates a wooden column of Macassar Ebony with Satinwood inlays.

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FINISHING

The metal is hand-polished with 4N gold plating. The main timber is sheen lacquer, full grain finish and burnished.

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SUSPENSION

The Classis chronometer suspension features double gimbals, counterbalance free and double lock.

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GLASSES

Designed by Andrew Winch, the Thomas Mercer Classis glasses are extra-white crystal.

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Mechanism

calibre TM081 SPRING

Formed of a helical spring and ovalising balance, this mechanism confirms Thomas Mercer’s commitment to innovation backed up by heritage and authenticity. Aspiring to the theoretically perfect balance, its ovalising balance features a bar that forces the balance into an oval shape and does not expand or contract with changes in temperature. Coupled with an uncut ring that makes centrifugal errors practically disappear, this leads to a great reduction in residual and ‘middle temperature’ errors.

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POWER RESERVE

8 days

 

ESCAPEMENT

Spring Detent with fusee-and-chain drive

 

MAIN FUNCTIONS

Hour, Minute, Second, Power Reserve

 

DIMENSIONS

Diameter: 160mm
Height: 100mm

 
 

Technical Data

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Case

MaterialAISI 316 stainless steel
FinishHand polished and 4N gold plating (5 μm thickness)
Suspension Double gimbals, counterbalance free and double lock
GlassesExtra-white crystal
EngravingImage and name of the ship, departure year, coordinates
of significant point reached during the voyage of discovery
Setting24 rhomboidal plaques set with Ebony
DrawerHidden type, with push-catch opening and Ebony setting to host
the winding key
Dimensions- Base diameter: 423mm
- Top ring diameter: 296mm
- Height: 387mm

Dial

MaterialSolid Brass
TechniqueBas-relief (minute ring, main body, power-reserve indicator counter)
FinishRhodium and 4N Gold electroplating, dial mask featuring grene
technique
SettingHour ring in Macassar Ebony and Roman applique numerals
Engraved Mercator Map
HandsBlued steel, hand made

Wooden Column

Main TimberMacassar Ebony
InlaysSatinwood (dividers between Macassar Ebony, lettering)
finishA/C lacquer 90% sheen, full grain finish, burnished

Mechanism

CalibreTM0801
Power Reserve8 days
EscapementSpring Detent
Oscillator Ovalising balance with cylindrical weights
DriveMechanical spring with Fusee and Steel chain system
Frequency14.400 bph
Jewels17
Functions and IndicationsHour, minute, second
IndicationsPower reserve indicator at 12, small seconds with visible escapement at 6
FinishRhodium and 4N Gold electroplating
Inner plate in 4N Gold featuring grenée technique
Inner plate in 4N Gold featuring grenée technique
Skeletonised back plate with selective bi-colour electroplating
DimensionsDiameter: 160mm
Height: 100mm
 

“Once the timepiece that enabled adventurers to explore and map the World, with the Classis the marine chronometer now becomes an objet d’art of revolutionary design, desired and anticipated by the owners of the world’s finest yachts.”

ALESSANDRO QUINTAVALLE
CEO, THOMAS MERCER

OBSERVATORY

GRAND COMPLICATION

Legacy

Black

Legacy

SHACKLETON EPIC

SPECIAL PIECES

BRITTANICA OW 2015