Shown: reference 3875.20.37 · Photo: Omega
Omega

Speedmaster Professional Moonphase Broad Arrow 3875.20.37 Reference 3875.20.37

Speedmaster Professional Moonphase Broad Arrow Stainless Steel / Ivory

Overview

The Omega Speedmaster Professional Moonphase Broad Arrow 3875.20.37 has a 42 mm steel case with a white dial. It runs on the manual-winding Omega calibre 1866 with a 48 hour power reserve and is water resistant to 30 metres. The model has one reference, 3875.20.37. It is no longer in production.

Omega introduced the Speedmaster in 1957 as a sports and racing chronograph. About the Omega Speedmaster Moonwatch

Case diameter
42 mm
Movement
Calibre 1866
Water resistance
30 m
Power reserve
48 h

Specifications

Specifications from Omega and WatchBase. Last checked . Sources

Case

Diameter
42 mm
Lug width
20 mm
Material
Steel
Crystal
Sapphire
Water resistance
30 m
Weight
86 g

Dial

Colour
White

Movement

Calibre
Omega 1866
Type
Manual winding
Power reserve
48 h

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

Sources

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

MovementOmega calibre 1866Specifications and every watch that uses it

Speedmaster Professional Moonphase Broad Arrow 3875.20.37 questions

What size is the Omega Speedmaster Professional Moonphase Broad Arrow 3875.20.37?

The Omega Speedmaster Professional Moonphase Broad Arrow 3875.20.37 has a 42 mm case.

What movement does the Omega Speedmaster Professional Moonphase Broad Arrow 3875.20.37 use?

It uses the Omega calibre 1866.

What is the Omega Speedmaster Professional Moonphase Broad Arrow 3875.20.37 case made of?

The case is steel.

Is the Omega Speedmaster Professional Moonphase Broad Arrow 3875.20.37 water resistant?

It is rated to 30 m.

About the Omega Speedmaster Moonwatch

Omega introduced the Speedmaster in 1957 as a sports and racing chronograph. The first model, the CK 2915, used the calibre 321 movement and carried its tachymeter scale on the bezel. Wally Schirra wore his own Speedmaster on the Mercury mission of October 1962, and in 1965 NASA qualified the watch for all manned space missions after a series of tests. It was worn on the lunar surface during Apollo 11 in July 1969. The current Moonwatch Professional has a 42mm asymmetrical case, a black step dial, a tachymeter bezel and the manual-winding Co-Axial calibre 3861, certified as a Master Chronometer by METAS.

Sources: Omega: Our Space Legacy, Omega: Speedmaster Moonwatch Professional 310.30.42.50.01.001, Wikipedia: Omega Speedmaster, Christie's: Omega Speedmaster ref. 2915-2