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H. Moser & Cie. Pioneer Cylindrical Tourbillon Skeleton

With this new skeleton watch, Schaffhausen-based Manufacture H. Moser & Cie. has taken a new approach to its cylindrical tourbillon movement.

Made of stainless steel, the Pioneer case measures 42.8 mm diameter. Fitted with sapphire crystal glasses on the front and back, the Pioneer Cylindrical Tourbillon Skeleton showcases the magnificent HMC 811 three-dimensional Manufacture calibre.

This large, fully skeletonised movement with a 34 mm diameter incorporates the one-minute flying tourbillon, equipped with a cylindrical hairspring at 6 o’clock. Invented in the 18th century, the cylindrical hairspring rises perpendicularly around the upper stem of the balance spindle.

A frequent feature on marine chronometers at the time, it offers the advantage of developing concentrically. Thanks to the cylindrical hairspring, fitted with two Breguet curves attached at two points, friction on the pivots is reduced and the isochronal properties improved, even more when the hairspring is combined with a tourbillon as is the case here.

The cylindrical hairsprings used with this collection have been manufactured by Precision Engineering AG, H. Moser & Cie.’s sister company. Each cylindrical hairspring is shaped by hand, taking ten times longer to produce than a traditional hairspring.

At 12 o’clock, a small, domed sub-dial reflects the curve of the sapphire crystal and features the company’s signature colour, Funky Blue fumé. The white H. Moser & Cie. logo has a certain subtlety about it, while the indices are much bolder: created using Globolight®, a ceramic-based material containing Super-LumiNova®, these add to the three-dimensional nature of the piece, as do the inserts which top the hour and minute hands, also in Globolight®.

A skeleton model of the new HMC 811 calibre is used here, on both the front and the reverse side, where a large, gold and fully open rotor oscillates. The flying tourbillon twirls gracefully under the domed sapphire crystal.

The Pioneer Cylindrical Tourbillon Skeleton represents an important step for H. Moser & Cie., as it enters the skeleton watch segment and defines its own principles for this type of watchmaking.

The H. Moser & Cie. Pioneer Cylindrical Tourbillon Skeleton model features a black alligator leather strap, but can also be worn with a steel, rubber, textile or kudu leather strap, providing a variety of options. The watch is water-resistant to 12 ATM.

Technical details

Model: H. Moser & Cie. Pioneer Cylindrical Tourbillon Skeleton
Reference 3811-1200, steel model, Funky Blue fumé domed sub-dial, black alligator leather strap

Case
Steel topped by a slightly domed sapphire crystal
Diameter: 42.8 mm
Height without sapphire crystal: 11.7 mm
Height with sapphire crystal: 15.3 mm
Screw-in crown adorned with an engraved “M”
See-through case back
Water-resistant to 12 ATM

Dial
Funky Blue fumé domed sub-dial with sunburst pattern at 12 o’clock
Skeletonised dial
Indices in Globolight®
Hour and minute hands with Globolight® inserts

Movement
Fully skeletonised HMC 811, self-winding, three-dimensional Manufacture calibre
Diameter: 34.0 mm or 15 lignes/height: 5.5 mm (without hands or tourbillon)
Frequency: 21,600 Vib/h
28 jewels
171 components
Automatic bi-directional pawl winding system
Gold, fully skeletonised oscillating weight
Power reserve: minimum 74 hours
Cylindrical hairspring with 2 Breguet curves
One-minute flying tourbillon at 6 o’clock with skeletonised bridge; hand-bevelled balance bridge
Diamond bevelling
Main plate and bridges with anthracite PVD finish

Functions
Hours and minutes

Strap
Black alligator leather strap, hand-stitched
Steel folding clasp, engraved with the Moser logo

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