Watches and Wonders: Armin Strom Goes the Distance with the One Week Titanium Skeleton

Debuting in 2010, the astounding, double-barrel ARM09 movement, developed in-house by Armin Strom, kicked off the artful watchmaker’s ongoing One Week series of impressively powered week-on-one-wind wrist machines.

The super-powered movement approach progressed, as did the One Week concept, and by 2023, we saw more Strom-signature skeletonization entering the scene in the One Week First Edition.

Jump cut to last year, and we saw the stunning 41mm, steel-encased One Week Manufacture Edition, sporting an updated manual-wind ARM21 movement with its mechanical intricacies peeking around the dial plates.

Unveiled at Watches and Wonders 2025, the new One Week Titanium Skeleton might be the culmination of the watchmaker’s seven-day story.

The One Week models have been openworked, to some degree, from the start, with the earlier models providing apertures on the right side of the case showing off the two synchronized barrels (and their bridges) that comprise the movement’s impressive power train.
 

Today, if you look at the dial of this new timepiece, you’d be hard-pressed to find any remnant plate metal that could be cut away. While there might be a trade-off to not shining the visibility spotlight on specific components, there is certainly something to be said for seeing the entire stage now, in all its mechanical glory.
 

Now, while fully skeletonized, the new ARM21-S movement is not fully transparent through the case. The gears and mechanics are perfectly exposed but fit together in such a way that no light passes between the top crystal and exhibition caseback (which gives its own incredible view of the movement, by the way).
 

This choice fundamentally lends a sturdier air to the One Week Titanium Skeleton that speaks to its sporty, wearable nature.

One of the implied precepts of a watch you can wear all week long without winding is that it should also be comfortable to wear all week long, right?

To that end, a skeletonized movement certainly shaves vital grams off a timepiece’s overall weight. However, the Armin Strom One Week Titanium Skeleton’s secret sauce for addressing comfort is in its name: titanium.
 

More specifically, the use of Grade 5 titanium throughout this relatively burly 41mm timepiece makes it the lightest One Week model ever made. So, with wearability and comfort checked off, you also want a timepiece you enjoy looking at all week long, yes?
 

Fortunately, despite their mechanical complexity, the One Week models have always carried a dashing air of sportiness, and this new model also ties the bow on that zeitgeist. Crown protection, lumed indexes, 10 ATM of water resistance, and an H-link integrated bracelet (again, all in titanium) make for a notably handsome and unfussy skeletonized wristwatch appropriate for any wardrobe or time of day.