Ball Roadmaster Marine GMT DG3030B-S1CJ-BK 40mm – men's titanium GMT chronometer
Swiss precision engineering meets proprietary self-illumination in this COSC-certified automatic GMT, where 28 micro gas tubes glow independently for decades without external power. The lightweight titanium construction delivers professional tool-watch capability at 200 meters, while the unidirectional ceramic bezel tracks a third time zone for global travelers demanding accuracy and legibility in extreme conditions.
| Benefits |
| 28 micro gas tubes provide constant luminescence 100 times brighter than standard lume, requiring no light exposure to charge |
| COSC chronometer certification confirms accuracy within stringent Swiss standards, ensuring reliable timekeeping across time zones |
| Titanium construction reduces wrist fatigue during extended wear while resisting corrosion in marine environments |
| Key features |
| Bidirectional rotating inner bezel tracks a second time zone independently of the primary GMT hand |
| Anti-reflective sapphire crystal maintains dial clarity in bright sunlight and reduces glare during navigation |
| Screw-down crown with protective shoulder guards enhances water resistance integrity to 200 meters |
| Who it's for |
| Men who travel frequently across time zones and require simultaneous tracking of multiple regions |
| Those who value professional-grade tool watches with proven Swiss chronometer movements and military-grade illumination |
| How to use |
| Set home time via main hands; adjust GMT hand to track a second zone; rotate inner bezel to monitor a third time zone |
| Maintain automatic winding through daily wear or use a watch winder to preserve the 38-hour power reserve |
| Specs |
| Movement |
Ball RR1203-C automatic GMT chronometer, COSC certified, 38-hour power reserve |
| Case diameter |
40mm in grade 5 titanium with sapphire exhibition case back |
| Bracelet |
Titanium with stainless steel center links and deployant clasp |
| Bezel |
Unidirectional ceramic with blue and black colorway |
| Crystal |
Anti-reflective sapphire, highly scratch resistant |
| Water resistance |
200 meters, suitable for recreational diving |
| Functions |
Hours, minutes, seconds, GMT hand, day, date, inner rotating bezel |
| Illumination |
28 self-powered micro gas tubes on dial and hands |
| Model |
DG3030B-S1CJ-BK |
