Armin Strom builds its foundational calibre without a dial this time, letting a deep blue PVD mainplate stand as the face of the watch.
Armin Strom introduces the One Week Manufacture Edition Blue, limited to 100 pieces. Housed in a 41mm steel case on an integrated steel bracelet, the openworked watch foregoes a traditional dial entirely.
A black minute ring and small-seconds dial sit over the blue mainplate, with the movement’s ratchet wheels, barrels and gear train visible in motion. A three-dimensional power reserve indicator, driven by a conical gear and polished cone, nods to pocket watches.
The manual-winding calibre ARM21 runs two barrels in series for a full seven-day reserve, at a 3.5Hz beat chosen for chronometric stability. Every surface is hand-finished, with straight and circular graining, chamfered bevels and Geneva stripes, and each movement is assembled twice before it leaves the workshop.
Armin Strom calls it a masterclass in hand-decoration, from the purest of its watches to the most complex. This one puts the choreography of winding and unwinding on permanent display.
The Basics
Brand: Armin Strom
Model: One Week Manufacture Edition Blue
Reference: ST25-OW.05
Diameter: 41mm
Thickness: 10.60mm
Case material: Stainless steel; sapphire crystal and case back, anti-reflective
Dial: Openworked, no traditional dial; deep blue PVD mainplate; black minute ring and small-seconds dial; indexes and hands with Super-LumiNova
Water resistance: 10 ATM
Bracelet: Integrated stainless steel, double-folding clasp
Limited edition: 100 pieces
The Movement
Calibre: ARM21, manual winding
Functions: Hours, minutes, small seconds, three-dimensional power reserve indicator
Winding: Manual, two barrels in series
Power reserve: 7 days
Frequency: 3.5Hz (25,200 vph)
Jewels: 35
Images courtesy of Armin Strom.