GX-Diver's 44mm Cobalt 2.0 Blue Silicone

This watch runs on the La Joux-Perret G100, a newer-generation Swiss automatic built in La Chaux-de-Fonds. Its standout feature is a 68-hour power reserve. Take it off Friday night, and it's still running Monday morning.

The G100 has 24 jewels and beats at 28,800 vph for a smooth, sweeping seconds hand. It includes hacking seconds and a date. It's finished to a soigné standard with Côtes de Genève striping, visible through the exhibition caseback.

Accuracy is rated at ±5 seconds per day, tighter than most movements in its class.

• Caliber: La Joux-Perret G100
• Jewels: 24
• Frequency: 28,800 vph (4 Hz)
• Power reserve: 68 hours
• Finish: soigné, Côtes de Genève
• Accuracy: ±5 sec/day

Case Dimensions

• Case Diameter: 44.0 mm
• Case Thickness: 12.9 mm
• Lug-to-Lug: 52.0 mm
• Lug Width: 23.0 mm
• Weight (on bracelet): 108 g

Wrist Fit

• Leather strap: 6.5 to 8.75 in (16.5 to 22.2 cm)
• Rubber strap: 6.5 to 9.5 in (16.5 to 24.1 cm)
• Bracelet: 6.5 to 10.5 in (16.5 to 26.7 cm)

Not sure of your wrist size? Check out our Know Your Wrist Size Guide.

The 44mm Cobalt 2.0 is built on a solid, rugged case of surgical-grade 316L stainless steel with a brushed finish, left unplated so raw steel frames the dial. The 120-click unidirectional bezel carries a scratch-resistant high-polish blue ceramic insert inlaid with BGW9 Swiss Super-LumiNova, so it stays sharp by day and glows at night. An anti-reflective sapphire crystal sits on top, the skeleton case back is fastened with actual screws for a secure seal, and the case is water-resistant to 300 meters.

• Solid, brushed 316L steel case
• 120-click blue ceramic bezel
• Screwed skeleton case back

The 44mm Cobalt 2.0 wears a deep cobalt blue multi-layer wave sandwich dial, its textured top plate stacked over a sun-brushed center for real depth. Every hand-applied index is filled with BGW9 Swiss Super-LumiNova. The sword-shaped hour and minute hands are polished steel with lumed centers, and the orange second hand cuts across the cobalt with every sweep.

• Deep cobalt wave dial
• Polished steel lumed hands
• Orange second hand

300m Water Resistance, Screw-Down Crown

This watch is water-resistant to 300 meters (30 bar), so it's built for swimming, snorkeling, and recreational scuba diving, as well as everything on land.

The screw-down crown threads tightly into the case and presses against a gasket to seal out water, dust, and pressure. Screw it in snugly after setting the time, and the case stays sealed.

• Water resistance: 300m / 30 bar / 1,000 ft
• Suitable for: swimming, snorkeling, recreational diving
• Crown: screw-down, with gasket seal

Sapphire Crystal, Front and Back

Both crystals are synthetic sapphire, rated 9 out of 10 on the Mohs scale, second only to diamond. Keys, zippers, and desk edges won't scratch either side.

The anti-reflective coating goes on the inside only, front and back. Outer coatings smudge and wear, so the surfaces you touch stay pure sapphire. You get a glare-free view of the dial and the movement.

• Material: synthetic sapphire, front and back
• Hardness: 9 out of 10 on the Mohs scale
• Coating: anti-reflective, inside only
• Outer surfaces: uncoated, for full scratch resistance