Armin Strom caliber ASS20 is based on caliber ASB19 and features triple pocket watch style bridges on the dial side, a Geneva-drive equal force “stop work” barrel which provides constant force to the balance system.

Caliber: ASS20

Release Date: March 2022

Country: Swiss made

Type: Automatic

Dimensions: 35.53 mm/8.42 mm

Total Components: 273

Jewels: 30

Oscillating Frequency: 25,200 vph (3.5Hz)

Power Reserve: 72-hours

Functions: Hours, minutes, small seconds, power reserve indicator, on-demand date with rapid corrector

Balance Wheel: Variable inertia, free-sprung with 4 regulating screws

Rotor: micro-rotor

Finishing: hand beveling and polishing, perlage, straight graining, circular graining, frosting, Geneva stripes

Special: Geneva-drive equal force barrel with stop-work function, column-wheel date