Speedmaster Broad Arrow 3855.75.12 Reference 3855.75.12

Speedmaster Broad Arrow Stainless Steel / Diamond / MOP

Overview

A 42 mm steel case with a white dial defines the Omega Speedmaster Broad Arrow 3855.75.12. Inside is the self-winding Omega calibre 3303, which has a 55 hour power reserve. The watch is water resistant to 100 metres. The model has one reference, 3855.75.12.

Case diameter: 42 mm
Movement: Calibre 3303
Water resistance: 100 m
Power reserve: 55 h

Specifications

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

Case

Diameter: 42 mm
Lug width: 20 mm
Material: Steel
Crystal: Sapphire
Water resistance: 100 m
Weight: 66 g

Dial

Colour: White

Movement

Calibre: Omega 3303
Type: Automatic
Power reserve: 55 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 3303Specifications and every watch that uses it

Speedmaster Broad Arrow 3855.75.12 questions

What size is the Omega Speedmaster Broad Arrow 3855.75.12?

The Omega Speedmaster Broad Arrow 3855.75.12 has a 42 mm case.

What movement does the Omega Speedmaster Broad Arrow 3855.75.12 use?

It uses the Omega calibre 3303.

What is the Omega Speedmaster Broad Arrow 3855.75.12 case made of?

The case is steel.

Is the Omega Speedmaster Broad Arrow 3855.75.12 water resistant?

It is rated to 100 m.