Speedmaster Broad Arrow Co-Axial GMT 3881.30.37 Reference 3881.30.37

Speedmaster Broad Arrow Co-Axial GMT Stainless Steel / White

Overview

A 44.25 mm steel case with a white dial defines the Omega Speedmaster Broad Arrow Co-Axial GMT 3881.30.37. Inside is the self-winding Omega calibre 3603, which has a 52 hour power reserve. The watch is water resistant to 100 metres. One reference is listed, 3881.30.37.

Case diameter: 44.25 mm
Movement: Calibre 3603
Water resistance: 100 m
Power reserve: 52 h

Specifications

Specifications from Omega and WatchBase. Last checked 6 October 2026. Sources

Case

Diameter: 44.25 mm
Lug width: 21 mm
Material: Steel
Crystal: Sapphire
Water resistance: 100 m
Weight: 114 g

Dial

Colour: White

Movement

Calibre: Omega 3603
Type: Automatic
Power reserve: 52 h

Not yet recorded: thickness, lug-to-lug, case back, shape, indexes, hands, functions, years.

Sources

Omega: case, water resistance, dial, movement. View sources
WatchBase: case, water resistance. View sources

Missing values are shown as not yet recorded, never estimated. How we source our data

MovementOmega calibre 3603Specifications and every watch that uses it

Speedmaster Broad Arrow Co-Axial GMT 3881.30.37 questions

What size is the Omega Speedmaster Broad Arrow Co-Axial GMT 3881.30.37?

The Omega Speedmaster Broad Arrow Co-Axial GMT 3881.30.37 has a 44.25 mm case.

What movement does the Omega Speedmaster Broad Arrow Co-Axial GMT 3881.30.37 use?

It uses the Omega calibre 3603.

What is the Omega Speedmaster Broad Arrow Co-Axial GMT 3881.30.37 case made of?

The case is steel.

Is the Omega Speedmaster Broad Arrow Co-Axial GMT 3881.30.37 water resistant?

It is rated to 100 m.