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 145.022-69 Pre-Moon

Omega - 145.022-69 · $5,000

A pre-moon Omega Speedmaster in great shape with a faded bezel and factory crystal.

Condition: Pre-owned, some servicing required
Case shape: round
Dial color: black
Bracelet included: yes

Posted at

Feb 8, 2026, 2:43 PM

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LEGENDARY 1967 Omega Speedmaster Ed White Pre Moon Cal 321 Chronograph Ref ST 105.003 on Rare JB Champion Bracelet w/ Extract!

Omega - ST 105.003 · $11,950

This Omega Speedmaster Ed White Pre Moon Cal 321 Chronograph is an iconic watch that went to space on the wrist of astronaut Ed White in 1965. The watch comes with an Omega extract showing it was originally delivered to Italy and features a rare JB Champion mesh bracelet.

Condition: Excellent, minimal signs of wear
Bracelet type: Rare JB Champion mesh bracelet
Movement: Cal 321 hand winding chronograph
Case size: 40MM diameter

Posted at

Feb 8, 2026, 2:29 PM

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Omega 310.63.42.50.10.001 Gold Speedmaster Moonwatch

Omega - 310.63.42.50.10.001 · $18,600

A gold Omega Speedmaster Moonwatch with a beautiful green dial and bezel, and an incredible exhibition caseback.

Condition: Excellent near mint condition
Case size: 42mm diameter
Warranty expiration date: December 26, 2025

Posted at

Feb 8, 2026, 1:42 PM

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310.30.42.50.01.002 Omega Sapphire Speedmaster 2025 | Complete Box & Papers | $6,699 shipped

Omega - 310.30.42.50.01.002 · $6,699

This is the current-generation sapphire sandwich reference Omega Speedmaster Professional featuring the classic black dial on a stainless steel bracelet and the updated Caliber 3861 movement. The watch comes complete with original inner and outer boxes, booklet, and warranty card.

Condition: Excellent overall condition, with a few light marks on the case and minor hairlines on the bracelet.
Case size: 42mm
Movement: Manual-wind Caliber 3861 (Master Chronometer)
Crystal: Sapphire (front & display caseback)

Posted at

Feb 8, 2026, 1:35 PM

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2025 Unworn Omega Speedmaster 38mm Cappuccino Sedna Gold With Factory Diamonds 324.28.38.50.02.002 Just In Time For Valentines! $9,495

Omega - 324.28.38.50.02.002 · $9,495

This listing features a brand new Omega Speedmaster, ideal for Valentine's Day.

Condition: Unworn
Diameter: 38mm

Posted at

Feb 8, 2026, 10:58 AM

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Omega Speedmaster Racing Cart

Omega - 3510.80 · $3,899

This Omega Speedmaster Racing Cart Edition features a 39mm case in excellent condition, including original box, card, authentication papers, and extra links.

Condition: Mint
Case size: 39mm

Posted at

Feb 7, 2026, 8:16 PM

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2024 Omega Speedmaster “First Omega in Space” 310.30.40.50.06.001 – Full Set - $6,750 Shipped

Omega - 310.30.40.50.06.001 · $6,750

2024 Omega Speedmaster “First Omega in Space” - a modern reissue honoring the Speedmaster worn by Wally Schirra during the Sigma 7 mission, featuring a slimmer 39.7mm case and vintage-inspired design.

Condition: Good (normal signs of wear)
Case size: 39.7mm
Movement: Manual-wind chronograph (Omega Caliber 3861, Master Chronometer)
Water resistance: 50m depth rating

Posted at

Feb 7, 2026, 8:12 PM

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Omega Speedmaster Professional Moonwatch Full Steel Yellow Patina 1978 (Serviced)

Omega - 145.022-78 · $5,050

This Omega Speedmaster Professional Moonwatch is a well-preserved and reliable example of the Speedmaster Moonwatch, featuring a black tritium dial with even yellow patina across all hour markers.

Condition: Very good overall shape, all-original condition
Case size: 42mm
Year: 1978
Movement serviced: February 2026

Posted at

Feb 7, 2026, 5:24 PM

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