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Ulysse Nardin Blast Dual Time 42mm Stainless Steel Case
Ref. 243-20-3/42
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Stepping up in the same colour and case shape
The 42mm stainless steel case combines brushed and polished surfaces, sitting above a fixed black-coated bezel. The sunray-brushed black dial carries applied indices and Roman numerals, with an oversized double-window date display at two o'clock and a small seconds sub-dial at six. The home time indication sits at nine, adjusted via pushers on the left flank. Hands and markers are filled with luminous material. The self-winding UN-24 calibre runs at 4 Hz with a 42-hour power reserve. A black rubber strap with pin buckle completes the watch.
- Reference
- 243-20-3/42
- Brand
- Ulysse Nardin
- Case size
- 42mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Black
- Crystal
- Sapphire
- Movement
- Automatic
- Calibre
- UN-24
- Functions
- GMT, Date
- Water resistance
- 50m
- Bracelet / strap
- Rubber strap
- Strap colour
- Black
- Clasp
- Buckle
- Lume
- Luminous
- Retailer
- Goldsmiths
Additional specifications
- Power reserve
- 42 hours
- Warranty
- 5 years
Learn more about Ulysse Nardin
Leonard Ulysse Nardin founded his workshop in Le Locle in 1846 and specialised in marine chronometers — the instruments ships used to determine longitude, where an error of seconds meant an error of miles.
The house became one of the two or three most important chronometer makers in the world. More than fifty navies used Ulysse Nardin instruments, and the company holds an extraordinary record at observatory trials: over four thousand certificates and dozens of gold medals, more precision awards than any other manufacturer.
Its modern era began in 1983 when Rolf Schnyder bought the failing company and partnered with Ludwig Oechslin, a scientist and horological historian. The results were the Astrolabium Galileo Galilei of 1985, which displays the positions of sun, moon, and stars and entered the Guinness records as the most functional wristwatch, followed by the Planetarium and Tellurium — together the Trilogy of Time.
Oechslin also designed the Freak of 2001, arguably the most radical wristwatch of the modern era: no dial, no hands, no crown. The entire movement rotates to indicate the time, and it was the first watch to use silicon components in the escapement, a material now standard across the industry.
The Marine collection continues the chronometer heritage. Kering acquired the brand in 2014.
- 1846
- Leonard Ulysse Nardin founds the workshop in Le Locle.
- 1985
- The Astrolabium Galileo Galilei is released.
- 2001
- The Freak pioneers silicon escapement components.
- 2014
- Acquired by Kering.
Also in 4 collections
This watch appears in Back in Stock (2,812), Stainless Steel Watches (2,706), Automatic Watches (1,549) and GMT Watches (208).
Temporarily out of stock
Goldsmiths is not currently taking orders for this reference. Last listed as available on 14 September 2026. Stock is checked nightly and this page updates when it returns.
What the specifications mean
A mechanical watch for everyday wear.
Strengths
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
- Second time zone for travelling
- Sits in the lower half of Ulysse Nardin's range as we list it
Worth knowing
- 50m suits rain and handwashing, not swimming
Ulysse Nardin Blast Dual Time alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | 243-20-3/42 | 168589-6002 | 1-36-04-04-02-30 |
|---|---|---|---|
| Price | £8,830 | £9,240 | £10,100 |
| Case size | 42mm | 42mm | 42mm |
| Water resistance | 50m | 50m | 50m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Rubber strap | Leather strap | Leather strap |
| Power reserve | 42 hours | 42 hours | — |
| This watch | Closely matched |
|
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Frequently asked questions, and things you should know about this watch
Can I swim with it?
Showering yes, swimming no. 50m covers splashes and brief immersion, but a swimming stroke generates well above the pressure that figure describes.
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 automatic — the motion of your wrist winds it, and there is no cell to replace.
Quartz, automatic and solar comparedHow long does it run for when it's not worn?
About 42 hours fully wound — enough to survive a night off the wrist, but not a full weekend.
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