The Aquareef 40
The Specification
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Dual Time. Double Impact
The Aquareef 40’s internal chapter ring. controlled via a screw-down crown at 2 o’clock, allows wearers to effortlessly track a second time zone - the perfect companion for travel, business and global lifestyles.
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A Fresh Palette
Featuring Golby’s trademark oil-pressed dial, the Aquareef 40 introduces six bold new colourways, each with their own unique personality.
With colour-coordinated, sword-style hands, illuminated with BGW9 Super-Luminova.
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Built for Adventure
Featuring a 120-click countdown bezel with sapphire insert and BGW9 Super-Luminova.
20ATM/200m water resistance.
Flat sapphire crystal with 5 layers of internal AR coating.
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Refined Engineering
At its heart, the Aquareef 40 houses the Miyota 9015 automatic movement, a proven Japanese calibre, renowned for its slim profile, reliability and precision. With a 42-hour power reserve, 24 jewels, 28,800 bph, and hacking functionality, it’s built for longevity.
The exhibition case back with sapphire glass frames the custom wave design rotor.
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On-the-Fly Adjustments
Stainless steel bracelet with brushed finish and curved end links. safety-lock clasp with lift and slide 12mm micro-adjust system. Quick-release twin-pinch spring bars. Screw pins with included screwdriver. Unadjusted length: 20.35cm; fits wrist 5” and above
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BGW9 Super-Luminova
The markers, hands and bezel are finished with BGW9 Super-Luminova, offering clarity and function in all lighting conditions.
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What's in the Box
The Aquareef 40 comes in a custom hard-shell travel box, on a steel bracelet. With a coordinating FKM strap, screwdriver and warranty card.
The Model: The Aquareef 40
Case: 40mm bezel upon a 39mm 316L stainless steel case. 11.5mm thickness, 47mm lug-to-lug
Bezel: 120-click sapphire crystal countdown bezel (anti-clockwise rotation)
Water Resistance: 20ATM / 200m water resistance
Face: Flat sapphire crystal with 5 layers of internal AR coating
Case Back: Exhibition case back with sapphire glass & custom wave design rotor
Crown: Dual crowns (screw-down at 2 & 3 o’clock)
Dial: Oil-pressed wave-pattern dial with Golby branding. Date window at 6 o’clock.
Chapter Ring: Internal rotating chapter ring, numbered 1–12, for dual time tracking
Markers: Gunmetal grey applied indices filled with BGW9 Super-Luminova
Hands: Sword-style, colour-coordinated hands with BGW9 lume
Bracelet: Stainless steel bracelet with brushed finish & curved end links, quick-release twin-pinch spring bars, safety-lock clasp with Lift & Slide 12mm micro-adjust system, screw pins with included screwdriver. Unadjusted length: 20.35cm; fits wrists 5" and above
Movement – Miyota 9015 (Japan). Automatic, self-winding, 24 jewels, 3.9mm thick, 26mm diameter, 28,800 bph (4Hz), 42-hour power reserve, accuracy: -10 / +30 sec/day, hand-windable, hacking seconds, uni-directional rotor (clockwise), Parashock protection