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Arnold & Son UTTE Skeleton Watch Is Thinnest Skeleton Tourbillon

Arnold & Son UTTE Skeleton Watch Is Thinnest Skeleton Tourbillon Watch Releases

In 2013, Arnold & Son raised eyebrows with their Ultra-thin Tourbillon Escapement “UTTE” watch which, back then, was the world’s thinnest tourbillon watch. The watch was just 8.34mm thick and housed the calibre A&S8200 which measures just 2.97mm thick. Though it has since lost the title of thinnest tourbillon watch to the Bulgari Octo Finissimo Tourbillon (hands-on here), the UTTE still remains an impressive masterpiece.

Skeletonizing a watch is no easy feat. And it’s doubly hard for an ultra-thin movement, mainly because the movement is already so thin that removing any more material is bound to affect structural rigidity. As a result, the A&S8200 calibre in the Arnold & Son UTTE Skeleton watch had to be thoroughly redesigned and re-engineered. The result is the A&S8220 calibre, which measures 3.3mm thick. The extra thickness, according to Arnold & Son, is necessary to guarantee rigidity as they sought to skeletonized the movement. Still, let’s face it, 3.3mm for a tourbillon movement with two barrels and a power reserve of at least 90 hours is seriously impressive.

Arnold & Son UTTE Skeleton Watch Is Thinnest Skeleton Tourbillon Watch Releases

Arnold & Son UTTE Skeleton Watch Is Thinnest Skeleton Tourbillon Watch Releases

The new A&S8220 calibre boasts some major revisions. For instance, the main plate has been heavily modified to reveal as much as possible of the inner workings. But perhaps what’s most visible to owners is that the tourbillon cage has been totally reworked to show off more of the mechanism while retaining the three-dimensional design that has become a signature of the earlier Arnold & Son UTTE watch. In addition, the tourbillon cage is relatively large as compared to the movement. It measures 14mm across, while the movement itself is 32mm. This means it’s the single most dominating component of the dial, and on top of that is the fact that the cage is fully hand-polished and chamfered, making it a real visual treat for owners.

Arnold & Son UTTE Skeleton Watch Is Thinnest Skeleton Tourbillon Watch Releases

Arnold & Son UTTE Skeleton Watch Is Thinnest Skeleton Tourbillon Watch Releases

And as you would expect, the A&S8220 calibre is also treated to the finest haute horlogerie finishing: The main plate and bridges are constructed using nickel silver and finished with Côtes de Genève rayonnantes; The edges are also polished and chamfered; The steel components, gears, and ratchets are all satin-finished with their edges polished and chamfered; The screws have bevelled and polished heads, and finally, the jewels are placed in polished countersinks; Reading of the time is done off a sapphire disc with printed numerals at 12 o’clock; The hour and minute hands are golden and feature white lacquered tips.

Arnold & Son UTTE Skeleton Watch Is Thinnest Skeleton Tourbillon Watch Releases

The Arnold & Son UTTE Skeleton comes in a 42mm 5N red gold case, which is as exquisitely crafted as the movement. It is stepped, tapering from top to bottom. The dial part, which is the widest section, also features an extra-large sapphire glass to showcase the caliber A&S8220 in all its glory. The bottom of the case is made narrower to fit snugly on the wrist.


The Arnold & Son UTTE Skeleton watch will be limited to just 50 pieces, and each watch will come with a hand-stitched brown or black alligator leather strap with a matching 5N red gold buckle with the Arnold & Son logo. Price is $76,



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  • Marius

    I’m sorry, but is Arnold&Son a watch manufacturer or a graphic design studio? Over the last months, Arnold&Son and Angelus have released quite a few 3D renderings but few actual watches.

    It seems to me that they adopted the strategy of real-estate developers, showing 3D renderings of their projects and hoping to find buyers before actually manufacturing the watches.

    • iamcalledryan

      Last image is not 3d render. Touched up, yes, but not 3d render.

      Regardless, overly touched up images and 3d renderings are extremely annoying, especially when watches of this quality look better in many blogger’s hands-on shots. It’s not limited to Angelus/A&S at all, it’s extremely common across all new press releases. There are certainly some that present the images before the watches have actually been produced, but also there are plenty with very strong prototypes or production models yet they choose to rely on GCI.

      • iamcalledryan

        Case in point, this image may not give you the best view of the components, but it does a far better job of helping one appreciate that Angelus are not photoshop watchmakers:

  • Ulysses31

    This is a super-slim watch that I find quite attractive. Other slim watches seem to lack the detail and depth (no pun intended) of their huskier brethren. That isn’t a problem here. Also, black and gold look great when done like this.

  • iamcalledryan

    With every watch they create, A&S are making their way onto my best-of-the-best list.

  • JimBob

    Are they going to make any of these without tourbillions at a more accessible price point? Or is that counter to their business plan?

  • SuperStrapper

    About as good a ‘thin’ watch can get before I get turned off. I don’t like skinny girls, either.

  • spiceballs

    As Kenny wrote – seriously impressive.

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