The Aquareef 40
The Specification
-
![]()
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.
-
![]()
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.
-
![]()
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.
-
![]()
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.
-
![]()
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
-
![]()
BGW9 Super-Luminova
The markers, hands and bezel are finished with BGW9 Super-Luminova, offering clarity and function in all lighting conditions.
-
![]()
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
Any unsold units from British Watchmakers’ Day on the 7th March 2026 will be available online after the event.
Please note that due to the texture and material, the colours can vary greatly depending on the lighting.