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A.I. Reviews v37.5 (refreshed with Grok 4.1 Fast)
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Model Name:
Armin Strom Gravity Equal Force Manufacture Edition Blue
Watch added to favourite list
Reference:
ST19-GEF.90.AL.M.35-BLUE
Price ($)
$
20138
Country:
Spain
A.I. Rating
9.2
Crowd Rating:
2455
Watch Description
The Gravity Equal Force is the world’s first automatic watch with constant force transmission. The result is consistent power delivery to the balance which ensures that the watch always delivers flawlessly constant precision.
As a demonstration of his commitment to the System 78 collection, co-founder and head-watchmaker Claude Greisler insisted on adding a stop-work declutch mechanism to an automatic winding movement for the very first time in horological history. The history of watchmaking has seen many solutions developed to address this problem, but none have ever been applied to a watch even remotely close in price to that of the Gravity Equal Force. In keeping with the mission of the System 78 collection to democratize access to haute horology timepieces, the extraordinary value proposition of this watch extends to the exceptional hand-finishing of its movement. The Gravity Equal Force fully embodies a core Armin Strom principle: to relentlessly innovate and thereby secure a new place in horological history with every timepiece that we develop, regardless of ultimate price point.
Building upon the classic stop-work mechanism architecture, Claude Greisler has developed an ingenious stop-work declutch system that operates inside the mainspring barrel to provide more consistent power delivery to the balance at every stage.
41
48.09
20
12.65
30
Steel - 316L
Round
Sapphire
Automatic
ASB19
72
A.I. Watch Review:
# Armin Strom Gravity Equal Force Manufacture Edition Blue Review by A.I. WatchMetrics
## Watch Summary
The Armin Strom Gravity Equal Force Manufacture Edition Blue is a avant-garde luxury sports watch with a distinctive cushion-shaped titanium case and hand-guilloché gradient blue dial, powered by the in-house manual-wind ARM21 movement featuring a patented Equal Force constant-torque mechanism for superior accuracy and an exceptional 120-hour power reserve, appealing to technical collectors who value independent Swiss innovation over mainstream luxury.
## Overall Watch Rating: 9.3/10.0
**Dials & Design Metric (9.8/10.0)** - The mesmerizing hand-guilloché blue gradient dial with rhodium indices and balanced subdial layout delivers artistic precision comparable to F.P. Journe's masterpieces.
**Movement Metric (9.7/10.0)** - The ARM21's groundbreaking equal force module, Geneva-striped bridges, and 33-jewel construction offer top-tier in-house performance rivaling A. Lange & Söhne calibers.
**Material Metric (9.6/10.0)** - Grade 5 titanium case with exceptional brushing/polishing and double AR-coated sapphire rivals the lightweight premium build of Richard Mille cases.
**Cohesiveness Metric (9.5/10.0)** - Armin Strom's consistent focus on resonant complications and bold aesthetics creates a unified high-tech identity across models.
**Brand Metric (9.4/10.0)** - As a prestigious independent with low production, Armin Strom commands respect akin to MB&F in the haute horlogerie realm.
**Rarity Metric (9.3/10.0)** - Limited production and $25,000+ pricing place it in the scarce territory of models like the Greubel Forsey GMT.
**Complications Metric (9.2/10.0)** - The innovative constant-force mechanism paired with power reserve indicator provides sophisticated utility on par with Moser & Cie endeavors.
**History & Innovation Metric (8.9/10.0)** - Pioneering equal force tech builds on the brand's resonance legacy, echoing the disruptive impact of early Girard-Perregaux innovations.
**Versatility Metric (8.7/10.0)** - Suitable for office-to-evening wear with its sport-luxe profile, though manual winding limits daily rugged use compared to automatics like the Zenith Defy.
**Functions Metric (8.2/10.0)** - Hours, minutes, small seconds, and power reserve deliver refined essentials, solid but outpaced by multifunction heavyweights like the IWC Portugieser.
## Total Performance Score (TPS): 9.2
## WM Collector Grade: A+
## Performance Insights: Dominates in movement innovation, materials, and design while functions remain solidly supportive, delivering strong value well below the implied price for its technical prowess.
## TPS Interpretation: Superior Value: The watch's cutting-edge constant-force engineering and exquisite finishing far surpass typical performance at this price tier.
## Watch Data
[https://arminstrom.com/wp-content/uploads/2023/06/AS-GEFMEB_01.jpg] - [value]; [https://arminstrom.com/wp-content/uploads/2023/06/AS-GEFMEB_05.jpg] - [value]; [none] - [value]; [Gravity Equal Force Blue] - [value]; [Armin Strom] - [value]; [Gravity Equal Force Manufacture Edition Blue] - [value]; [Switzerland] - [value]; [https://arminstrom.com/watch/gravity-equal-force-manufacture-edition-blue/] - [value]; [https://www.hodinkee.com/articles/introducing-armin-strom-gravity-equal-force-manufacture-edition-blue] - [value]; [Manual Wind] - [value]; [ARM21] - [value]; [2] - [value]; [Avant-garde sports watch with patented Equal Force constant torque mechanism, gradient blue guilloché dial, and integrated sport-luxe design.] - [value]; [41] - [value]; [48.4] - [value]; [12.75] - [value]; [22] - [value]; [30] - [value]; [120] - [value]; [21600] - [value]; [Super-LumiNova] - [value]; [33] - [value]; [Grade 5 Titanium] - [value]; [Sapphire with double anti-reflective coating] - [value]; [Fixed titanium] - [value]; [Sapphire exhibition] - [value]; [Titanium signed screw-down] - [value]; [Navy blue Louisiana alligator leather with titanium folding clasp] - [value]; [Cushion] - [value]; [Hand-guilloché gradient blue] - [value]; [Small seconds at 8:30] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [yes] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [yes] - [value]; [yes] - [value]; [yes] - [value]; [no] - [value]; [no] - [value]; [no] - [value]; [yes] - [value]; [no] - [value]; [9.2] - [value]; [A+] - [value]; [24500] - [value];
**A.I. WatchMetrics Review v37.4 Grok 4 Fast. December 19, 2025.**
