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Arnold & Son Nebula 41.5mm Steel Mens Watch Blue
Ref. 1NEAS.U01A.K002S
The Nebula's 41.5mm stainless steel case is slim at 8.75mm, housing a fully open-worked movement that doubles as the dial. The A&S5201 calibre is built around a symmetrical architecture, with all gearing arranged so the movement reads as a composed whole rather than an assembly of parts. A blue PVD flange frames the skeletonised view, with rhodium-plated baton appliqués and obelisque-shaped hands. Small seconds sit at 7 o'clock. Sapphire crystals front and back allow the 90-hour twin-barrel movement to be seen from either side. A blue ballistic rubber strap with a stainless steel pin buckle completes the watch.
- Reference
- 1NEAS.U01A.K002S
- Brand
- Arnold & Son
- Case size
- 41.5mm
- Case thickness
- 8.75mm
- Case material
- Blue PVD
- Case shape
- Round
- Dial
- Blue
- Crystal
- Sapphire
- Movement
- Manual
- Calibre
- A&S5201
- Functions
- Small seconds
- Water resistance
- 30m
- Bracelet / strap
- Rubber strap
- Strap colour
- Blue
- Clasp
- Buckle
- Retailer
- Goldsmiths
Additional specifications
- Power reserve
- 90 hours
Learn more about Arnold & Son
John Arnold was the outstanding English watchmaker of the eighteenth century, and the one who made precision timekeeping practical. Harrison had proved a chronometer could work; Arnold made it manufacturable, and it was Arnold who coined the word chronometer in its modern sense.
His detent escapement and helical balance spring became the basis of marine chronometer design for the next hundred and fifty years. His chronometers went to sea with Captain Cook, and his workshop and his son John Roger Arnold supplied the Royal Navy through the age of sail.
Arnold also made a watch small enough to be set into a ring, presented to George III, which was the technical marvel of its day.
The name was revived in modern Swiss watchmaking and the company now operates from La Chaux-de-Fonds under the same ownership as the movement maker La Joux-Perret.
Modern Arnold & Son keeps to the founder's territory — visible mechanics, tourbillons, dead-beat seconds and true-beat complications, generally with the movement architecture displayed on the dial side rather than hidden behind it.
- 1764
- John Arnold establishes his workshop in London.
- 1772
- Presents a ring-mounted watch to George III.
- 1779
- Coins the term chronometer for his precision timekeepers.
- 1782
- Patents the helical balance spring.
- 1995
- The name is revived in Swiss watchmaking.
Also in 2 collections
This watch appears in Stainless Steel Watches (2,994) and Blue Dial Watches (826).
Temporarily out of stock
Goldsmiths is not currently taking orders for this reference. Last listed as available on 14 August 2026. Stock is checked nightly and this page updates when it returns.
What the specifications mean
Strengths
- 8.75mm is unusually slim for a 41.5mm case
- Sapphire crystal, which resists scratching
Worth knowing
- 30m means keeping it away from water
Arnold & Son Nebula alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | 1NEAS.U01A.K002S | 1-66-06-04-22-62 | 3713-260-3/03 |
|---|---|---|---|
| Price | £15,700 | £10,900 | £20,660 |
| Case size | 41.5mm | 42mm | 42mm |
| Water resistance | 30m | 50m | 50m |
| Movement | Manual | Manual | Manual |
| Strap | Rubber strap | Leather strap | Leather strap |
| Power reserve | 90 hours | 41 hours | 96 hours |
| This watch |
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Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
No. At 30m it will survive rain and handwashing, but not submersion of any kind.
Water resistance explainedWill the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Sapphire, mineral and acrylic comparedDoes it need a battery?
No. It is hand-wound, so it needs winding every day or two but never a battery.
Quartz, automatic and solar comparedHow long does it run for when it's not worn?
About 90 hours fully wound — enough to sit off the wrist over a weekend and still be running.
Is it a men's or women's watch?
Listed as men's.
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