Armin Strom x Horomariobro Pure Resonance Ultimate Sapphire

A collaboration between Armin Strom and renowned macro photography collector Horomariobro, the Pure Resonance Ultimate Sapphire is a 10-piece limited edition that blends technical mastery with minimalist aesthetics. Available exclusively through Oster Jewelers in Denver. Housed in a 42mm stainless steel case with brushed and polished finishes, the watch features front and back sapphire crystals with anti-reflective treatment and offers 50 metres of water resistance. Its dial showcases a monochromatic theme, with an off-centred hour and minute display in grey metallic sapphire crystal. The highlight of the dial is the visible resonance clutch spring and dual balance wheels on the left is Armin Strom signature that reflects the brand’s pursuit of chronometric precision.

At the heart of the watch is the manually wound calibre ARF16, developed in-house and beating at 25,200 vibrations per hour. The movement incorporates a patented resonance mechanism using two independent gear trains, linked by a clutch spring, to synchronise the dual regulators enhancing accuracy and stability. It delivers a 48-hour power reserve and displays only the hours and minutes to maintain dial purity. Fitted with a black fabric strap and light grey stitching, the watch secures with a stainless steel double-folding clasp. The Pure Resonance Ultimate Sapphire is a refined, collector-focused execution of Armin Strom’s resonance innovation, elevated through the minimalist lens of Horomariobro’s aesthetic philosophy. This pre-owned timepiece is in mint condition with paper box and warranty dated Oct 2023, and includes an additional one-year TLE warranty for added peace of mind.