Two balance wheels, locked together by a resonance clutch until they beat as one. Huygens watched it happen between two pendulum clocks in 1665; nobody held that synchronization steady on a moving wrist until now. The gold movement underneath doesn’t hide the effort — it frames it.
Key Details
Movement: Armin Strom in-house Manufacture Caliber ARF21_ZG, manual winding, 3.5Hz (25,200vph), 80-hour power reserve from two independent barrels
Regulating system: two independent regulators synchronized through Armin Strom’s patented resonance clutch
Functions: hours, minutes, twin-seconds with flyback reset
Finishing: 3N yellow gold-coloured mainplate and bridges, hand-bevelled and polished edges, black-polished screws, perlage and circular graining
Case: stainless steel, 43mm diameter, 11.55mm height, 49.60mm lug-to-lug, 3 ATM water resistance, sapphire crystal and case back with anti-reflective treatment
Dial: noir vernis laqué poli (black lacquer), off-center
Hands: heat-blued stainless steel, manufactured and hand-finished by Armin Strom
Strap: dark grey Alcantara with grey stitching, stainless steel pin buckle
Limited to 25 pieces, individually engraved “1 out of 25”
Terms & Conditions
Collective Shop is an authorized retailer of all new watches we sell. Please review all shop policies for new watches here before purchase. If you have questions about the details of this or any watch, feel free to contact us prior to purchase at shop@collectivehorology.com.
By completing your purchase, you acknowledge and agree to Collective’s store policies. Please review them carefully before checkout, as all sales are subject to these terms, including restrictions on returns and refunds.
