Omega Speedmaster Speedmaster Professional Moonphase Broad Arrow Stainless Steel / Silver / Strap

Reference 3875.30.31

Omega Speedmaster Professional Moonphase Broad Arrow Stainless Steel / Silver / Strap

About this watch

The Omega Speedmaster Professional Moonphase Broad Arrow (model 3875.30.31) is a luxury watch that embodies precision, quality, and timeless design. This piece of history is part of the legendary 'Moonwatch' series, which was first worn on the moon during the Apollo missions. The 3875.30.31 model features the Omega caliber 1866 movement, a handwound chronograph movement that showcases exceptional engineering and precision. The watch's combination of white gold and stainless steel gives it a luxurious yet durable feel, while its sapphire glass provides scratch resistance for daily wearers. With a diameter of 42 mm and a lug width of 20 mm, this watch sits comfortably on the wrist, offering a classic look that complements both formal and casual attire. One of the standout features is its moonphase display at the 12 o'clock position, serving as a functional complication that appeals to enthusiasts who appreciate celestial aspects of watchmaking. The chronograph function allows for precise timing, making it practical and fun to use. The Omega Speedmaster Professional Moonphase is water-resistant up to 50 meters, suitable for everyday activities but not recommended for swimming or diving. This model comes with a sturdy strap that ensures a secure fit on the wrist, complementing its overall aesthetic and offering adjustability for different wrist sizes. At a reasonable weight, the 3875.30.31 feels substantial without being cumbersome, striking a perfect balance suitable for both all-day wear and special occasions.

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Key Features

Handwound chronograph movement (Caliber 1866)
Moonphase display at 12 o'clock position
Tachymeter bezel
Sapphire glass
Water-resistant up to 50 meters
Sturdy strap with adjustability
Reasonable weight and balance

Specifications

Brand

Omega

Family

Speedmaster

Model

Speedmaster Professional Moonphase Broad Arrow Stainless Steel / Silver / Strap

Reference

3875.30.31

Movement

1866

Movement Features

Hours, Minutes, Small Seconds
Date
Chronograph
Moonphase

Case

42mm

Dial Color

Silver

Crystal

Sapphire

Water Resistance

Current Listings

Omega Speedmaster 38 Co-Axial Chronograph 324.30.38.50.01.001 – Full Set – $3,800 + shipping

Omega - 324.30.38.50.01.001 · $3,800

The Omega Speedmaster 38 Co-Axial Chronograph features a black dial on the stainless steel bracelet, with typical hairline marks on the bracelet and a small scratch on the clasp. The crystal and dial are clean. This watch comes in its full set.

Condition: great condition with light wear
Bracelet size: not specified
Crystal type: not specified
Dial color: black

Posted at

Mar 12, 2026, 12:19 PM

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Omega Speedmaster Professional Moonwatch Sapphire 310.30.42.50.01.002 with Box & Manuals

Omega - 310.30.42.50.01.002 · $6,150

This Omega Speedmaster Professional Moonwatch features a stainless steel case, black bezel, and manual wind mechanical movement.

Condition: Nice Preowned Condition with Some Light Scratches on the Case, Bracelet and Buckle
Case dimensions: 42mm diameter
Bezel material: Stainless Steel
Dial color: Black

Posted at

Mar 11, 2026, 7:04 PM

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OMEGA X SWATCH Speedmaster Uranus

Omega · $350

A Speedmaster watch, purchased on vacation in Thessaloniki Greece, that has been worn less than 5 times and is not suited for the seller's lifestyle.

Condition: Very good

Posted at

Mar 11, 2026, 4:20 PM

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OMEGA X SWATCH Speedmaster Pluto

Omega - Speedmaster · $350

Condition: Excellent, possibly only worn once
Origin: Purchased in Paris at the Le Marais boutique

Posted at

Mar 11, 2026, 4:16 PM

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Omega Speedmaster Reduced 3510.50 39mm Watch Only $2,500

Omega - 3510.50 · $2,500

A Speedmaster Reduced from Omega, a watch only sale with the bracelet fitting about 18cm wrists.

Shipping origin: Singapore
Shipping to usa: 4-5 business days
Payment methods: Wise, Revolut, Wire Transfer, Crypto, Venmo

Posted at

Mar 11, 2026, 5:20 AM

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Omega Speedmaster Professional Moonwatch (Hesalite)

Omega - 310.30.42.50.01.001 · $5,750

This modern Omega Speedmaster Professional Moonwatch features Master Chronometer technology, a stainless steel case, and a black anodized aluminum tachymeter bezel.

Condition: Excellent
Case size: 42mm
Movement type: Co-Axial Master Chronometer Caliber 3861
Power reserve: 50 hours

Posted at

Mar 11, 2026, 12:04 AM

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Omega Speedmaster Automatic Day-Date 3520.50.00 MK 40 | Great Condition (Serviced) | $2450

Omega - 3520.50.00 MK 40 · $2,450

The Omega Speedmaster Automatic Day-Date features a stainless steel case with a twisted-lug design and domed sapphire crystal, powered by the modified Valjoux 7751 automatic chronograph movement.

Condition: Great condition, serviced
Movement: Omega 1151 (modified Valjoux 7751)
Case dimensions: 39mm diameter, 44.75mm lug-to-lug, 14mm thick
Lug width: 18mm

Posted at

Mar 10, 2026, 10:34 PM

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Omega Speedmaster Reverse 🔥BNIB 3/2026, $10.5k +Shipping🔥

Omega - 310.30.42.50.01.004 · $10,500

The Omega Speedmaster Reverse is being sold as a brand new watch with a reference number of 310.30.42.50.01.004.

Condition: Brand New
Serial Number: not found
Depth Rating: not found
Water Resistance: not found

Posted at

Mar 10, 2026, 10:19 PM

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Omega Speedmaster Professional Hesalite | 310.30.42.50.01.001 | Dated 03/2023 | $5500 OBO

Omega - 310.30.42.50.01.001 · $5,500

This Omega Speedmaster Professional Moonwatch features a stainless steel case with a black dial and Hesalite crystal, powered by a manual wind mechanical movement.

Condition: Very Good Condition
Case Dimensions: 42mm diameter
Bezel: stainless steel black
Dial Color: black

Posted at

Mar 10, 2026, 9:55 PM

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