Our Take

In recent years, Armin Strom has released more and more exciting timepieces through their System 78 collection – both the Orbit to the Gravity Equal Force. Back again with another spectacular addition to the catalog, Armin Strom presents the One Week First Edition during Geneva Watch Days 2023.

The One Week Collection was Armin Strom’s first release, arriving more than a decade ago. When we covered the increasing momentum of Armin Strom, Claude Greisler, the master watchmaker driving the Biel-based brand’s creations, mentioned that they were a little “shy” with their earliest timepieces. This was very much the proof-of-concept phase for Armin Strom. This One Week First Edition is a return to the origins of Armin Strom with a much bigger swing, adjusted for the significantly greater capabilities of the brand today.

True to its name and just like its predecessor, the One Week delivers an impressive seven-day power reserve. But that’s where the similarities end. The new manual-winding ARM21 caliber features two mainspring barrels, working in series to provide consistent levels of energy to the gear train. As a core part of Armin Strom’s identity, the kinetic mechanical elements are featured on the dial side. One of the most distinctive features of the new One Week is its power reserve indicator. Keeping with the architectural depth of the movement, the power reserve is indicated by a cone system, inspired by pocket watches. This consists of a mirror-polished cone, which is driven by a conical gear on the opposite side of the dial. The three-dimensionality of this dial brings the One Week Collection to a whole new level.

Like all Armin Strom creations, from the purest to the most complex, the One Week is a masterclass in haute horlogerie hand-finishing. Straight and circular grained surfaces, chamfered and polished bevels, Geneva-striped plates and polished screws and sinks are clearly applied by expert hands. The One Week First Edition stands out in particular with its cool light blue PVD-coloured mainplate and bridges. With modest dimensions for a sporty timepiece, the stainless steel case measures 41mm in diameter and a sleek 10.6mm in height. Limited to only 25, this is sure to be popular with collectors in search of an exquisite skeletonized timepiece for everyday wear.

The Details

Brand: Armin Strom

Model: One Week First Edition

Indications: Hours, minutes, small second

Movement: Armin Strom manufacture Calibre ARM21, manual winding

Regulating system: Screwed balance with Breguet overcoil

Power reserve: 7 Days

Dimensions: 36.60 mm × 6.00 mm

Frequency: 3.5 Hz (25,200 vph)

Finishing: Hand-finishing to the highest quality level

Number of components: 194

Case: Stainless steel

Diameter: 41 mm

Height: 10.60 mm

Water resistance: 10 ATM

Dial: Black minute ring and small-second dial, numbers and indexes with Super-LumiNova® filling

Hands: Faceted polished hands and Super-LumiNova® filling

Bracelet: Stainless steel with a double folding clasp

Limited to 25 pieces