Arnold & Son Nebula 41.5 Gold & Nebula 38 Gold

Created in two case dimensions, these new Arnold & Son Nebula watch models introduce a new colour combination, alternating between grey NAC and 5N red gold, serving to further highlight the striking structure of their skeletonised calibre.

The Nebula case is available in two diameters – 41.5 mm or 38 mm – and is remarkably slim, measuring just 8.73 mm thick. It is crafted from a block of 5N red gold for a limited edition of 88 pieces.

Arnold & Son Nebula 41.5 Gold

Arranged in a star around the edge of the calibre, the openworked, chamfered and satin-finished bridges create the impression of a watchmaking explosion, as well as a sense of rhythm and control. Positioned at regular intervals, these bridges are identical in shape but different in size and reflect the aesthetic heritage of John Arnold’s chronometers. They also illustrate Arnold & Son’s ‘Manufacture’ expertise.

Arnold & Son Nebula 41.5 Gold

A watch inspired by the stars, Nebula combines contrasting shades of gold and anthracite grey. The grey is created by a NAC treatment. When applied to the skeletonised main plate, the barrels and the flange, Nebula highlights the relief of its A&S5201 movement. Its construction is clearly legible on various levels, with the bridges in the foreground, the gear train and barrels on the second level, and the main plate behind them.

Arnold & Son Nebula 41.5 Gold

The A&S5201 calibre is visible through the sapphire crystal case-back. Two large arcs, also treated with NAC, intersect to reveal a second graphic structure, that of the main plate.

Arnold & Son Nebula 41.5 Gold movement

The highly open-worked movement is chamfered and its surface is covered with a signature Arnold & Son pattern known as ‘Rayons de la Gloire’.

Arnold & Son Nebula Gold watch movement

Like all the movements used by Arnold & Son, the A&S5201 calibre has been entirely developed, manufactured, decorated, assembled, adjusted and cased-up at the Manufacture in La Chaux-de-Fonds. This calibre draws on a pair of large barrels and an oscillating frequency of 3 Hz, which delivers a 90-hour power reserve.

Technical details

Models: Nebula 41.5 Gold & Nebula 38 Gold

Hours, minutes, small seconds

Calibre A&S5201, mechanical with manual winding
Jewels: 24
Diameter: 31.10 mm
Thickness: 4.18 mm
Power reserve: 90 hours
Frequency: 3 Hz / 21,600 vph

Movement finishes
Main plate: NAC-treated, ‘Rayons de la Gloire’ guilloché
Barrel covers: NAC-treated and sunray-brushed
Bridges: 18-carat red gold (5N), polished angles and satin-finished surfaces
Balance wheel: rhodium-plated
Wheels: circular-grained and bevelled
Screws: bevelled and mirror-polished heads

Anthracite flange, golden appliques

Material: 18-carat red gold (5N)
Diameter: 41.50 mm or 38 mm
Thickness: 8.73 mm
Crystal: Domed sapphire, anti-reflective coating on both sides
Case back: Sapphire crystal, anti-reflective coating
Water-resistance: 30 metres/100 feet

Nebula 41.5 / 38 Gold: grey hand-stitched alligator leather
Pin buckle in 18-carat red gold (5N)

Nebula 41.5 Gold: 1NEAR.S01B.C179A
Nebula 38 Gold: 1NEBR.A03A.C181A

88 timepieces each

Swiss retail prices (subject to change)
Nebula 41.5 Gold: CHF 30,900 including taxes
Nebula 38 Gold: CHF 28,600 including taxes