

The HZ.03 is a reflection of time and perspective, inspired by the first full portrait of Earth captured in 1972 - The Blue Marble . Beneath its domed sapphire crystal, an orbiting Earth on the seconds sub-dial traces a steady path around the dial, mirroring our planet’s orbit in space. Machined from grade 5 titanium, the 36mm case is lightweight and enduring, housing a precise Seiko VD78 quartz movement. Now available in natural stone, enamel lacquer and aventurine dials, each variant offers a distinct play of light; from the deep shimmer of the stars to the clarity of daylight on Earth. Compact, durable, and effortlessly wearable, the HZ.03 brings cosmic perspective to the wrist; a reminder that every second is part of something greater. Each HZ.03 Blue Marble is a limited run of 100 pieces, and once sold out will never be produced again.
Details and photos come from HZ Watches’s website, last checked Oct 26, 2026. Specs were read automatically and may contain mistakes.
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Cooper Watches
47.5 mm L2L · Quartz