The Titanium Field Guide

Ball Roadmaster Marine GMT

DG3030B

The Ball Roadmaster Marine GMT is a current-production diver watch with a Titanium (grade undisclosed) case, finished with satin-brushed / polished. It measures 40.0 mm across, 14 mm thick, and is water resistant to 200 m. Inside is the Ball RR1203-C automatic (cosc) movement. Complications: GMT, Day-date. Priced from $3,999 (approx). Brand origin: Switzerland.

Titanium diver watchesDisplay backGMT
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ReferenceDG3030B
TypeDiver
Price$3,999 · approx
Case diameter40.0 mm
Thickness14 mm
Lug-to-lug–
Water resistance200 m
Weight–
OriginSwitzerland
MovementAutomatic (COSC)
CaliberBall RR1203-C
Power reserve–
ComplicationsGMT, Day-date
TitaniumTitanium (grade undisclosed)
Surface treatmentSatin-brushed / polished
Nickel-freeYes
Bracelet / strapTitanium
CrystalSapphire (+ caseback)
Display backYes
DialBlack / blue (ceramic bezel)
LumeTritium micro gas tubes
AvailabilityOffered
StatusCurrent
High confidence Verified 2026-06-21 Source: aBlogtoWatch Maker / listing ↗
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