Arnold & Son Nebula 41.5 Steel

The new Nebula 41.5 Steel watch by Arnold & Son boasts a magnificent skeleton movement enhanced with grey and blue tones. Measuring just 8.73 mm thickness, this ultra-thin steel watch with blue PVD treated flange and movement parts offers a perfectly chic visual effect. It is the most symmetrical of Arnold & Son’s watches.

Arnold & Son Nebula 41.5 Steel

Inspired by the distinct body of interstellar clouds of same name, the Nebula watch boasts seven bridges on the dial side. Radiating from the centre outwards, these structures give the impression of a cosmic explosion.

Arnold & Son Nebula 41.5 Steel

Specially created for this Nebula watch, the A&S5201 movement is set apart by its skeletonisation and almost perfect symmetry. The traditional shape of its bridges is inspired by John Arnold’s chronometers and their open-worked structure accentuates the feeling of lightness in a very mechanistic design.

Arnold & Son Nebula 41.5 Steel

The bridges of the A&S5201 calibre are palladium-treated, giving a sheen that echoes the steel case. The mainplate, barrel covers, and dial flange have been coloured with a blue PVD treatment. The two-tone aesthetic adorns the interior and exterior, the substance of the watch and the details.

Arnold & Son Nebula 41.5 Steel

The A&S5201 calibre was conceived as a skeleton mechanism instead of being modified by removing material. The result is a completely clear and legible display on both sides. One by one, the components reveal their subtle finishes, adopting strict, fluid forms. At 4 mm thick, the calibre contributes to the piece’s overall slimness.

Arnold & Son Nebula 41.5 Steel watch

The A&S5201 calibre has also undergone several developments in addition to the new blue colouring. The balance wheel is now rhodium-plated to match the gear train and perfectly coordinate with the small seconds placed opposite.

Arnold & Son Nebula 41.5 Steel

The mainplate, particularly its reverse side, features “Rayons de la Gloire” finishes, a surface treatment similar to sunray-brushing in a wave shape. Once fully wound, the movement offers a total power reserve of 90 hours.

Arnold & Son Nebula 41.5 Steel

The Nebula 41.5 Steel is fitted with either a three-link steel bracelet or a ballistic-type rubber strap with a woven-look surface.

Technical details

Model: Arnold & Son Nebula 41.5 Steel

Nebula 41.5 Steel with stainless steel strap: 1NEAS.U01AK.002S
Nebula 41.5 Steel with Rubber strap: 1NEAS.U02AS.134D

Calibre A&S5201, hand-wound mechanical
Jewels: 24
Diameter: 31.50 mm
Thickness: 4.04 mm
Power reserve: 90 hours
Frequency: 3 Hz / 21,600 vph

Main plate: blue PVD, “Rayons de la Gloire” guilloché
Barrels: blue PVD treatment and sunray-brushed
Bridges: palladium treatment, polished angles and satin-finished surfaces
Balance wheel: rhodium-plated
Wheels: circular-grained and bevelled
Screws: bevelled and mirror-polished heads

Hours, minutes, small seconds

Blue PVD flange, rhodium-plated appliqués

Material: Stainless steel
Diameter: 41.50 mm
Thickness: 8.73 mm
Crystal: Domed sapphire, anti-reflective on both sides
Case back: Sapphire crystal, anti-reflective
Water-resistance: 30 metres / 100 feet

Stainless steel or blue “ballistic” rubber
Buckle: Folding clasp or pin buckle, stainless steel

Retail price in Switzerland
Nebula 41.5 Steel with stainless steel strap: CHF 16,900 tax included
Nebula 41.5 Steel with rubber strap: CHF 15,700 tax included