Lumis Day/Night Dial

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A dial that transitions from day to night — sunrise at 6am, sunset at 6pm. Part of the Riley Studio collection, Lumis is built around a simple idea — showing the transition from day to night on the wrist. The dial is designed to track the movement of time visually, with the sun rising at 6am and setting at 6pm, gradually shifting into night. As the day fades, the lower half of the dial reveals a darker landscape, creating a natural transition from daylight to evening. Each variant explores this concept through different colours and tones — from softer morning light to deeper, warmer finishes — while maintaining a clean, wearable design for everyday use. Powered by a Swiss movement and produced in limited numbers using our trusted manufacturing partners, Lumis sits slightly outside our core collection — a more experimental piece, without compromising on build quality. Specifications Swiss quartz movement (Ronda 515.24H) 38mm stainless steel case 9.25mm thickness 45mm lug-to-lug Multi-layer 3D dial construction K1 mineral crystal 20mm tapering to 18mm leather strap 5ATM water resistance Produced in limited runs — once sold out, this release wont return.