The Ulysse Nardin Blast Tourbillon is a 45 mm automatic watch built around the UN-172 movement and a flying tourbillon displayed in an X-shaped cage. “Blast Tourbillon” names a family, not one specification sheet: details such as materials, thickness, water resistance, strap and price depend on the exact reference. The figures below distinguish the manufacturer’s specifications from a retailer’s listing.
What is the Ulysse Nardin Blast Tourbillon?
The Blast is Ulysse Nardin’s modern, angular tourbillon watch. On the official 1723-400/00 page, the brand describes an automatic silicon tourbillon held in a bold X-shaped cage. Its stated functions are hours, minutes and a flying tourbillon. The design moves away from the brand’s familiar nautical associations: the official Blue & Gold page reproduces a comment by James Robinson / Time and Tide describing the Blast as trading aquatic inspiration for aeronautical inspiration and a new design language. Ulysse Nardin: 1723-400/00; Ulysse Nardin: Blue & Gold 1725-400-3A/3A
What movement is in the Blast Tourbillon?
The documented references use the self-winding UN-172. Ulysse Nardin publishes the following figures for the 1723-400/00 and Blue & Gold 1725-400-3A/3A:
- Parts: 137
- Jewels: 25
- Movement diameter: 37 mm
- Frequency: 2.5 Hz, or 18,000 vibrations per hour
- Power reserve: 72 hours
- Escapement: silicon
These are manufacturer specifications, not independent measurements of a particular watch’s accuracy or reserve. The Blue & Gold page specifically says silicon technology is used for the escapement wheel and balance spring. The Dragon retailer listing identifies an automatic UN-172 but does not provide the same detailed caliber breakdown. 1723-400/00 specifications; Blue & Gold specifications; Dragon retailer listing
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All three references below are listed at 45 mm and are associated with the UN-172, but the available information is not equally complete. Do not assume a case or strap detail listed for one applies to another.
| Reference | What the source specifies | Price information |
|---|---|---|
| 1723-400/00 | Ulysse Nardin lists a 45 mm diameter, self-winding UN-172 and grey calf-leather/rubber strap in an image caption. Strap dimensions and attachment details are not stated in the retrieved product text; case material, thickness and water resistance are also not stated there. | Not stated on the cited official product information. |
| Blue & Gold 1725-400-3A/3A | Ulysse Nardin lists a 45 mm diameter and the UN-172 specifications above. The retrieved product text identifies the Blue & Gold variant but does not state case alloy, thickness, water resistance or strap dimensions. | Not stated on the cited official product information. |
| Dragon 1725-400-2A/1A | Tourneau lists a 45 mm diameter, 13 mm thickness, 50 metres water resistance, automatic UN-172 and an alligator/crocodile strap. | Tourneau displayed $120,300 when accessed; this is a time-sensitive listing for this reference, not a universal Blast price. |
Sources: Ulysse Nardin 1723-400/00, Ulysse Nardin Blue & Gold, and Tourneau Dragon listing.
Rank #2
- Ulysse Nardin Marine Torpilleur Automatic Chronometer Blue Dial Men's Watch 1183-310-3/43
How much does a Ulysse Nardin Blast Tourbillon cost?
The only price established here is Tourneau’s displayed $120,300 for the Dragon reference 1725-400-2A/1A at the time the listing was accessed. It should not be treated as a current quote or as the price of every Blast Tourbillon. The cited official pages for 1723-400/00 and Blue & Gold 1725-400-3A/3A do not state a price. Check the exact reference and current seller listing before relying on a figure.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What should you verify before buying or servicing one?
Start with the reference number, then confirm every specification that matters for that particular watch. A family name alone is not enough to establish fit, condition, price or purchase terms.
Quick Recap
Best Value
- Polished 18kt rose gold case.
- Dial window material type: antireflective-sapphire
- Item shape: Round
- Display type: Analog
- Band material type: Leather
- Match the reference. Confirm whether the watch is 1723-400/00, Blue & Gold 1725-400-3A/3A, Dragon 1725-400-2A/1A, or another variant.
- Request the exact watch’s specifications. Ask the seller or Ulysse Nardin to confirm case material, thickness, water resistance and included strap for that reference; those details are not all present in the cited official product text.
- Check strap or part compatibility before ordering. The available specifications do not establish strap width, attachment dimensions, buckle details or compatible third-party straps and repair parts. Confirm compatibility with the manufacturer or a qualified watch service provider.
- Confirm current seller terms. Tourneau’s Dragon listing displayed a two-year manufacturer warranty and described five-year total coverage for new watches bought from Bucherer, plus a conditional 14-day exchange or refund window for qualifying online purchases. These are seller terms, subject to conditions and change; verify them directly before purchase.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
