Gerald Charles has leaned hard into the idea that a modern sports watch should do more than look athletic.
The Maestro GC Sport Tennis Turquoise is built around lightness, shock resistance and wearability, with a case designed for active use and a dial that gives the model its brightest court-side identity yet.
It’s also a reminder that performance watchmaking isn’t only about depth ratings or oversized cases, but about reducing mass without making the watch feel fragile.
At a glance
- Gerald Charles has introduced the Maestro GC Sport Tennis Turquoise as a 100-piece limited edition.
- The watch uses a 64-gram Darkblast Grade 5 titanium case with 5,000 g shock resistance.
- It is priced at £22,800, with an automatic manufacture movement and a turquoise Velcro strap.
A lightweight case made for movement
The watch is housed in Gerald Charles’s signature asymmetrical Maestro case, here made from Darkblast Grade 5 titanium.
Darkblast is the brand’s proprietary sandblasting treatment, used to give the titanium a matte black finish while enhancing scratch resistance.
The choice of Grade 5 titanium matters because it brings more than low weight to the equation.
The material is also corrosion-resistant, non-magnetic and hypoallergenic, all practical virtues in a watch meant to be worn beyond formal settings.
The case measures 39 mm by 41 mm and is 9 mm thick, with sapphire crystal on the front and an exhibition caseback.
Water resistance is rated to 10 ATM, equivalent to 100 metres.
The headline figure is the 64-gram case weight, which helps reduce the forces acting on the movement when the watch is exposed to sudden acceleration or impact.
Gerald Charles states that the Maestro GC Sport Tennis Turquoise offers 5,000 g shock resistance, a notable claim for a mechanical watch designed around real sporting use.
The crown is positioned on the left side of the case, a detail intended to make the watch more comfortable for right-handed tennis players during active play.
The turquoise dial gives the Sport Tennis its character
The dial is the visual centre of the watch, with a turquoise degradé finish that shifts from a brighter centre to a near-black outer edge.
Its grained surface gives the colour depth and allows it to react noticeably to changes in light.
Gerald Charles uses a mix of baton markers and Arabic numerals at 3, 9 and 12 o’clock, with a chemin de fer minute track framing the display.
The hour markers and hands are treated with Super-LumiNova, which emits a green glow in low light.
Functions are kept straightforward, with hours, minutes, central seconds and a date display at 6 o’clock.
The limited-edition status is marked on the dial, with production capped at 100 pieces.
The turquoise Velcro strap reinforces the tennis brief without turning the watch into costume.
It has a porous textured finish, is hand-stitched and includes an iron core for strength and flexibility.
An easy removal system allows the strap to be changed without making the process feel like a watchmaker’s task.
Calibre CGA2001 keeps the profile slim
Inside the Maestro GC Sport Tennis Turquoise is the self-winding Gerald Charles Manufacture Calibre CGA2001.
The movement is visible through the sapphire caseback, where the golden oscillating weight uses two hexagonal openings with a honeycomb-like appearance.
The finishing includes Côtes de Genève rayonnantes on the bridges and perlage on the mainplate.
A decorated channel beside the bridges accommodates the outer edge of the rotor, helping the movement achieve a thickness of 3.7 mm.
Despite that slim construction, the calibre uses two barrels to provide a 50-hour power reserve.
The twin-barrel architecture is intended to deliver power more evenly to the escapement, supporting rate stability.
The movement also uses a variable-inertia balance rather than a more common index-regulated system.
Its inertia weights are positioned in-board on the spokes of the balance wheel, a configuration intended to reduce air disturbance as the balance oscillates.
Details & Specifications
| Brand | Gerald Charles |
|---|---|
| Model | Maestro GC Sport Tennis Turquoise |
| Reference | GC2.0-TX-TNDB-33GR-RSVC_DLE |
| Case material | Darkblast Grade 5 titanium |
| Case size | 39 mm x 41 mm |
| Thickness | 9 mm |
| Case weight | 64 grams |
| Water resistance | 10 ATM, 100 metres |
| Shock resistance | 5,000 g |
| Dial | Turquoise degradé textured dial |
| Functions | Hours, minutes, central seconds, date |
| Movement | Gerald Charles Calibre CGA2001, automatic |
| Frequency | 28,800 vph, 4 Hz |
| Jewels | 28 |
| Components | 189 |
| Power reserve | 50 hours |
| Strap | Turquoise Velcro strap with textured finish and integrated Darkblast buckle |
| Limited edition | 100 pieces |
| Price | £22,800 RRP as of 20 October 2026 |
The Maestro GC Sport Tennis Turquoise makes the strongest case for itself when viewed as a mechanical sports watch with a clear use case rather than a colour update.
Its appeal sits in the combination of low mass, serious shock resistance, a slim manufacture calibre and a dial that gives the technical brief a more expressive face.
