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Face up photo of Nebula 41.5 Steel

Nebula 41.5 Steel

Built like radiant stars, the Nebula are bursting with light. Created in two case dimensions, they introduce new colour combinations, alternating between black DLC and steel, serving to further highlight the striking structure of their skeletonised calibre.


The symmetrical elegance of the Nebula collection is entering a new orbit. Arnold & Son shines for its watchmaking skill, its attention to detail and its powerful designs.

Since its creation, Nebula has been a star. Its stellar mechanism, the A&S5201 calibre, is the gravitational force of this collection, giving it its appearance, identity and strength. Redesigned with a movement whose finishes are more advanced than ever, the Nebula collection continues its expansion.

CHF 16,000
incl. VAT
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Technical Specifications

Reference: 1NEAS.B03A.C169S
hours, minutes, small seconds
31.10 mm
4.18 mm
Power reserve:
90 hours
3 Hz / 21,600 vph
black flange, rhodium-plated appliques
stainless steel
41.5 mm
8.73 mm
domed sapphire, with an anti-reflective coating on both sides
sapphire crystal, with an anti-reflecting coating
Water resistance:
3 bar (30 metres/100 feet)
black alligator leather, hand-stitched
pin buckle, stainless steel

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Photo of Nebula 41.5 Steel


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 stainless steel.

Photo of Nebula 41.5 Steel


Arranged in a star around the edge of the calibre, the openworked, chamfered and satinfinished 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.

Photo of Nebula 41.5 Steel


In space, light never exists alone, but coexists with darkness. A watch inspired by the stars, Nebula thus naturally plays with chiaroscuro. It combines contrasting shades of rhodium-plating and black. The black colour is created by a DLC coating. 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.

Photo of Nebula 38 Steel


Viewed from the back, the A&S5201 calibre takes on another dimension. Two large arcs, also treated with DLC, intersect to reveal a second graphic structure, that of the main plate. Highly openworked, it, too, is chamfered and its surface is covered with a signature Arnold & Son pattern known as ‘Rayons de la Gloire’.