Ulysse Nardin offers an extended 5-year warranty on all newly-purchased watches.

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Blast Hourstriker 45mm


Ulysse Nardin offers an extended 5 year warranty on all newly-purchased watches.

Strap variations

Created to break the sound barrier

Inspired by watchmaking’s past and the possibility of moving musical timekeeping into the future, Blast Hourstriker wants you to hear time again, not read it. When the striker is on, the mechanical ballet that makes the watch’s sound is visible on the hour and half hour, but even its occasional activation is just as beautiful. The mechanism, driven by a specially dedicated barrel, is triggered, the hour rack and the inertia regulator start to turn; the hammers hit the gong whose shape has been subtly worked to bypass the cage of the flying tourbillon.


The case of each Ulysse Nardin timepiece is individually numbered on the side.

To ensure that the Blast Hourstriker’s striking mechanism acoustic reach the best quality/sound performance ratio, this movement incorporates a high-tech titanium membrane first developed in the Classico Phantom Timepiece in collaboration with Devialet – the French audio technology company with whom one of whose co-founders is a direct descendant of the Ulysse Nardin family.

The case with a design which matches the unparalleled performance of the Hourstriker Blast is inspired by stealth airplanes, with its geometric construction where the facets play with the light to strengthen the energetic and modern natures of its lines, made sense.



Technical specifications


UN-621 Manufacture movement

18ct rose gold & Titanium


Self winding

Diameter 45mm
Height 16 mm

Water resistance
30 m


Flying tourbillon



Beware of Blast

New technological prowess made with rock-star and edgy lines. For Explorers above and beyond the pale


Our engagements

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Free Returns

If you are not 100% satisfied with your purchase, you can return the product and get a full refund. You can return a product for up to 30 days from the date you purchased it.

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Free shipping

Shipping to the United States and the United Kingdom is free of charge. The delivery time is normally between 3 and 5 business days but due to the Covid-19 situation it may be delayed up to 10 days.

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warranty extension

Your new timepiece comes with a standard 2-year international warranty. To extend this warranty further, we invite you to register your timepiece within one year from purchase date.

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Blockchain block

For each timepiece purchased, we provide a certificate of authenticity in your name, protected by blockchain technology.

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