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
50

Current Listings

[WTS] 2025 Omega Speedmaster Racing 44mm - 329.32.44.51.01.001 - Clean!

2025 Omega Speedmaster Racing 44mm - 329.32.44.51.01.001 - Clean!

Omega - 329.32.44.51.01.001 · $6,295
This Omega Speedmaster Racing Co-Axial Master Chronometer Chronograph combines the heritage of the Speedmaster line with bold orange racing accents and the modern Caliber 9900 Master Chronometer movement. It features a factory black micro-perforated leather racing strap with orange rubber lining and an Omega folding deployant clasp.

  • Condition: barely worn, preowned
  • Movement: Caliber 9900 Co-Axial Master Chronometer
  • Power reserve: approximately 60 hours
  • Strap: factory black micro-perforated leather with orange rubber lining and Omega folding deployant clasp
Posted at
Jan 24, 2026, 9:51 PM
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[WTS] 📣🚨OMEGA Speedmaster "FOIS" 311.32.40.30.01.001 EXCELLENT CONDITION! **$4500**🚨📣

📣🚨OMEGA Speedmaster "FOIS" 311.32.40.30.01.001 EXCELLENT CONDITION! **$4500**🚨📣

OMEGA - 311.32.40.30.01.001 · $4,500
This Omega Speedmaster 'First Omega in Space' is a manual wind watch with a 39.7mm case size and Caliber 1861 movement.

  • Condition: Excellent / like new
  • Case Size: 39.7mm diameter
  • Movement Type: Manual wind (Caliber 1861)
  • Condition Details: Excellent / like new (watch), shows wear on original box
Posted at
Jan 24, 2026, 9:08 PM
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[WTS] 2025 MINT Omega Speedmaster Moonphase Meteorite Dial

2025 MINT Omega Speedmaster Moonphase Meteorite Dial

Omega - 304.30.43.52.01.001 · $14,189
This Omega Speedmaster Moonphase features a 43mm stainless steel case with a PVD black-coated meteorite plate dial, manual winding chronograph movement, and sapphire crystal exhibition caseback. It is certified by METAS and has a power reserve of approximately 60 hours.

  • Case Size: 43mm
  • Case Material: Stainless Steel
  • Dial: Genuine Meteorite
Posted at
Jan 24, 2026, 7:47 PM
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[WTS] Omega Speedmaster Dark Side of the Moon 311.92.44.51.01.003

Omega Speedmaster Dark Side of the Moon 311.92.44.51.01.003

Omega - 311.92.44.51.01.003 · $6,500
This Omega Speedmaster Dark Side of the Moon features a 44.25mm black zirconium ceramic case and a Co-Axial calibre 9300 self-winding chronograph movement. The watch has a 60-hour power reserve, silicon balance-spring for resistance to magnetism, and is certified as a chronometer.

  • Condition: Pristine pre-owned with No dings dent or scratches anywhere
  • Case size: 44.25mm
  • Strap: 3 Straps (2 OEM / 1 AM)
  • Movement: Co-Axial calibre 9300, self-winding chronograph movement
Posted at
Jan 24, 2026, 7:38 PM
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[WTS] BNIB Omega Speedmaster Professional, White Lacquer Dial - Full Set - $7400

BNIB Omega Speedmaster Professional, White Lacquer Dial - Full Set - $7400

Omega - 310.30.42.50.05.001 · $7,400
This Omega Speedmaster Professional features a white lacquer dial and is housed in a Master Chronometer movement.

  • Condition: Brand New In Box (BNIB), perfect condition, 10/10
  • Movement: Master Chronometer Omega Cal. 3861
  • Box Set: true
Posted at
Jan 24, 2026, 6:21 PM
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[WTS] Omega “Silver Snoopy” Speedmaster

Omega “Silver Snoopy” Speedmaster

Omega - 310.32.42.50.02.001 · $13,999
This commemorative Omega Speedmaster Silver Snoopy Award pays tribute to NASA's 1970 Silver Snoopy Award with a detailed caseback animation of Snoopy in orbit and mission-inspired design.

  • Condition: Brand new, unworn
  • Case Diameter: 42mm
  • Water Resistance: 50m depth rating
  • Movement: Omega Co-Axial Master Chronometer Calibre 3861
Posted at
Jan 24, 2026, 6:21 PM
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[WTS] Omega Speedmaster Professional 310.30.42.50.04.001 white dial, 2024 full set

Omega Speedmaster Professional 310.30.42.50.04.001 white dial, 2024 full set

Omega - 310.30.42.50.04.001 · $7,699
2024 Omega Speedmaster Professional with a white dial and new style bracelet.

  • Condition: Perfect
  • Case size: 42mm
  • Bracelet type: stainless steel with sliding clasp adjustments
Posted at
Jan 24, 2026, 6:00 PM
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[WTS] Omega Speedmaster FOIS – Full Set – $4,300 Shipped

Omega Speedmaster FOIS – Full Set – $4,300 Shipped

Omega - Speedmaster FOIS · $4,300
A manual winding Omega Speedmaster from 2017 with a case size of 39.7mm and Hesalite crystal, presented in full set condition including multiple straps and documentation.

  • Condition: Very good overall
  • Case Size: 39.7mm
  • Movement: Manual winding
Posted at
Jan 24, 2026, 2:38 PM
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[WTS] 2024 Omega Speedmaster “First Omega in Space” 310.30.40.50.06.001 – Full Set – $6,450 Shipped

2024 Omega Speedmaster “First Omega in Space” 310.30.40.50.06.001 – Full Set – $6,450 Shipped

Omega - 310.30.40.50.06.001 · $6,450
This is a 2024 Omega Speedmaster 'First Omega in Space' reference featuring a 39.7mm case with straight lugs and a vintage-inspired aesthetic, paired with Omega's Master Chronometer technology.

  • Condition: Excellent
  • Case size: 39.7mm
  • Movement: Omega Caliber 3861, Master Chronometer manual-wind chronograph
  • Water resistance: 50m
Posted at
Jan 24, 2026, 1:20 PM
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