Armin Strom Gravity Equal Force SS 41mm

TYPE: Watches
DESIGNER: Armin Strom

Call (303) 572-1111 for Price

Armin Strom presents the Gravity Equal Force in Stainless Steel (as shown) and Rose Gold (available here), an innovative and handsome watch with a Stop-Work declutch mechanism and Equal Force Barrel. Featuring hours, minutes, seconds, and a power reserve of 72h with a 41mm Case. 

Ref. ST19-GEF.90.AL.M.35

The Gravity Equal Force is the latest addition watch demonstrating a core principle of Armin Strom: always be innovating. This watch takes the traditional mainspring barrel and flips it on its head with the addition of stop-work declutch mechanism united with automatic winding to create consistent power delivery to the balance. With a strong redesign of the movement, case, and dial, a new era is marked with the launch of the new System 78 collection with the Gravity Equal Force for the manufacture.

As a guiding principle for Armin Strom, every watch released from their manufacture must include an innovation. Behind the inspiration of Gravity Equal Force was a desire to transmit equal force to the balance. By doing so increases the consistency of rate. Building upon the classic stop-works mechanism, Armin Strom developed an ingenious stop-works declutch system that operates inside the mainspring barrel to limit the torque delivered to the balance, providing smooth power delivery. This represents the first time a stop-works declutch mechanism has been added to an automatic winding movement.

Never satisfied with only one innovation, Armin Strom found inspiration in a pocket watch from a U.S. collector that was in need of repair. Motivated by this, the watchmakers created a barrel operating in the opposite direction of a traditional mainspring barrel by driving the going train via the barrel arbor & winding the barrel housing, thus improving both functionality and reducing wear.

This revolutionary design creates a stable, low-friction axis of rotation for the mainspring to deliver power from the barrel arbor, supported by precision jewel bearings. Though utilizing only a portion of the mainspring by preventing it from completely unwinding, Armin Strom still achieved a 72 hour power reserve. The mainspring bears a power reserve indicator on the barrel for reference, wound by a unidirectionally winding micro rotor seen from the dial.

The new caliber ASB19 exhibits Armin Strom's commitment to use in-house R&D and continually question existing theory to advance horological technology as evidenced with numerous small improvement to the going train and winding mechanism. The more classically-inclined collector should appreciate the 41-millimeter case, a first for Armin Strom. The essence of Armin Strom's DNA is maintained through the contemporary dimensions while shaping a new aesthetic that showcases a reduction to the essential. By moving to an off-center dial, the Gravity Equal Force is more legible to maximize the user experience for discerning collectors.

Visit us in Cherry Creek North to personally design your own Armin Strom Gravity Equal Force Watch with the Armin Strom Configurator. 

Technical Specifications

Stop-Work declutch mechanism and Equal Force Barrel

Stainless steel
Sapphire crystal and case back with anti-reflective treatment
Diameter: 41.00 mm 
Height: 12,65 mm
Water-resistance: 30 m

Offset with subdial

Stainless steel with hand finishing

Delivered with a genuine alligator leather strap in blue

Ardillon buckle in stainless steel and a double-fold clasp in stainless steel.


Oster Jewelers is an Authorized Armin Strom Retailer

Brand Armin Strom
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