ARMIN STROM Gravity Fire


ARMIN STROM Gravity is the first watch from the Biel-based Manufacture to feature an automatic winding mechanism with micro rotor.

With this first series of automatic watches driven by the Manufacture’s new AMR13 calibre, ARMIN STROM wanted to express the essence of a fundamental law of physics – that of gravity. Thus, the laws of gravity are used in an automatic watch to transform movements into a mode of indicating the time.

However, the ARMIN STROM Gravity does not simply provide a glimpse of how this transformation works, rather, the dial is designed to proudly display the micro rotor, which captures the power of the movements and transforms them into energy. The visibility of this mechanism is made possible thanks to an innovative concept of transmission for the rotor, which remains smaller in size than the diameter of the going barrel.

The ARMIN STROM Gravity collection is available in four colourways that represent the four elements: FIRE, EARTH, WATER and AIR. The ARMIN STROM Gravity boasts the same exceptional level of finishing that has contributed to the reputation of the brand and of its eponymous founder. This is a timepiece that will appeal to connoisseurs of fine watchmaking wishing to celebrate the movement in all its forms.

ARMIN STROM - Gravity Fire
Ref. : RG13-GF.90
Edition Limited to 100 pieces

Manufacture movement

  • ARMIN STROM calibre AMR13 Automatic, 5-days power reserve, small seconds and off- centre time indications
  • Frequency: 18,000 A/h
  • Jewels: 32
  • Number of components: 171

For more info on calibre, see last tab


  • 18ct rose gold Sapphire crystal and case back with anti-reflective treatment
  • Diameter: 43.40 mm
  • Total height: 13.00 mm
  • Water-resistance: 50 m

Dial ring Black with founded appliques

Hands Mirror polished


  • Delivered with a genuine brown alligator horn-back strap and 18ct rose gold ardillon buckle as well as an additional brown rubber strap.
  • A double-fold clasp in 18ct rose gold is available on option

AMR13 Calibre 16½’’’ 

Specification: Functions: 

Hours, minutes, small seconds 




Going barrel made of special brass 

Plates and bridges: 

Plate and bridges are decorated at the highest level, hand-engravings always correspond to each element 


Escape wheel and pallets made of massive gold with hardened functional areas 

Regulating system: 

Genuine screwed balance with gold screws, adjusting of the mass moment of inertia by four clamped steel screws, Breguet spiral curve 


18,000 A/h 

Number of jewels: 


Number of individual parts: 



36.60 mm 


6.00 mm 

Power reserve: 

5 days