Armin Strom’s caliber ARF22 features dual independent time zone displays regulated by symmetrically mirrored oscillators that operate in anti-phase to become synchronized mirror images of each other via the natural phenomenon of Resonance.
The manufacture caliber ARF22 features two mainspring barrels providing a power reserve of 42 hours, all wound by a single crown at 4 o’clock. Two separate gear trains drive the independent time displays. The engraved and mirror-polished day/night indicators depicting the sun and moon are mounted on 24-hour wheels directly on the movement. Two crowns positioned on either side of the case allow for the independent setting of each dial down to the minute as opposed to only being able to set the hours (or half hours) independently like most GMT watches.
Additionally, the ratchet click system on the dial side of the timepiece provides this animation on the watch face, transforming the winding of the movement into a multi-sensory experience. Unlike traditional click mechanisms connected to ratchets, the Dual Time GMT Resonance’s three-dimensional ratchet mechanism is connected to a pinion that is positioned between the two barrels to distribute the load more evenly. This two-part system consists of a bottom gear with Breguet teeth fixed to the mainplate and a top element with a spring connected to the axis. This approach provides more precise engagement and disengagement of the winding mechanism resulting in more consistent performance, more efficient energy transfer, reduced friction and wear on components, smoother operation, and better overall durability for the winding system.
Caliber: ARF22
Release Date: 2024
Country: Swiss made
Type: Manual Wind
Dimensions: 34.15 mm/4.92 mm
Total Components: 231
Jewels: 40
Oscillating Frequency: 3.5Hz (25,200 VPH)
Power Reserve: 42 hours
Functions: Two independent time displays each indicating hours, minutes, and day/night
Control: Left crown for setting the time of left dial/right crown for setting the time of right dial and winding
Balance Wheel: Two independent regulating systems connected by a resonance clutch spring
Finishing: Geneva stripes (manual), beveling (CNC and by hand), polishing, straight graining, frosting, black polish, 3D engraving, circular graining, side grinding, polished sinks
Unique Features: Anthracite PVD-colored main plate, independent dual time indications, patented resonance regulation system
Photos by Armin Strom.
