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] OMEGA Speedmaster "Dark Side of the Moon" Apollo 8 Ref. 311.92.44.30.01.001 + Apollo 8 Gen2 Strap + Deployant Clasp - ULTIMATE SET! 馃敟$10,000馃敟

OMEGA Speedmaster "Dark Side of the Moon" Apollo 8 Ref. 311.92.44.30.01.001 + Apollo 8 Gen2 Strap + Deployant Clasp - ULTIMATE SET! 馃敟$10,000馃敟

OMEGA - 311.92.44.30.01.001 路 $10,000
The OMEGA Speedmaster Dark Side of the Moon Apollo 8 commemorates the 50th anniversary of the Apollo 8 mission, featuring a black ceramic case and a laser-ablated dial representing the lunar surface.

  • Condition: UNWORN
  • Case diameter: 44.25mm
  • Movement: Calibre 1869
Posted at
Feb 8, 2026, 7:44 PM
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[WTS] OMEGA Speedmaster Calibre 321 "Ed White" Ref. 311.30.40.30.01.001 - ULTIMATE SET! 馃敟$17,500馃敟

OMEGA Speedmaster Calibre 321 "Ed White" Ref. 311.30.40.30.01.001 - ULTIMATE SET! 馃敟$17,500馃敟

OMEGA - 311.30.40.30.01.001 路 $17,500
A faithful recreation of the Speedmaster Calibre 321, famously worn by astronaut Ed White during America's first spacewalk, featuring a stainless steel case and iconic straight lugs.

  • Condition: UNWORN
  • Case Material: stainless steel
  • Diameter: 39.7mm
  • Movement: Calibre 321 column-wheel chronograph movement
Posted at
Feb 8, 2026, 7:32 PM
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[WTS] Omega Speedmaster Professional, White Lacquer Dial - BNIB - $7,000

Omega Speedmaster Professional, White Lacquer Dial - BNIB - $7,000

Omega - 310.30.42.50.05.001 路 $7,000
The Omega Speedmaster Professional features a white lacquer dial and is a Master Chronometer with Cal. 3861 movement.

  • Condition: BNIB, perfect 10/10 condition
  • Movement: Master Chronometer Omega Cal. 3861
  • Strap material: black rubber
Posted at
Feb 8, 2026, 6:24 PM
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[WTS] Omega Speedmaster DSOTM - Vintage Edition

Omega Speedmaster DSOTM - Vintage Edition

Omega - 311.92.44.51.01.006 路 $6,600
This Omega Speedmaster Dark Side of the Moon Vintage Edition is a rare and no longer made version, featuring a black ceramic case with good specifications including a +0s/day accuracy.

  • Condition: Nearly perfect
  • Case Diameter: 44mm
  • Lug To Lug: 49mm
  • Weight: 99 grams
Posted at
Feb 8, 2026, 4:34 PM
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[WTS] 馃張Super Deal 馃張 OMEGA Speedmaster Pro Moonwatch 3861 Hesalite - 2024 Card - Warranty to 2029 - $5,299

馃張Super Deal 馃張 OMEGA Speedmaster Pro Moonwatch 3861 Hesalite - 2024 Card - Warranty to 2029 - $5,299

OMEGA - 310.30.42.50.01.001 路 $5,299
This Omega Speedmaster Professional is a 2024 full kit with new micro adjust clasp and warranty through 2029.

  • Condition: Excellent, used
  • Size: 42mm diameter
  • Case condition: Fantastic
Posted at
Feb 8, 2026, 2:54 PM
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[WTS] Omega Speedmaster 145.022-69 Pre-Moon

Omega Speedmaster 145.022-69 Pre-Moon

Omega - 145.022-69 路 $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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[WTS] LEGENDARY 1967 Omega Speedmaster Ed White Pre Moon Cal 321 Chronograph Ref ST 105.003 on Rare JB Champion Bracelet w/ Extract!

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 路 $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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[WTS] Omega 310.63.42.50.10.001 Gold Speedmaster Moonwatch

Omega 310.63.42.50.10.001 Gold Speedmaster Moonwatch

Omega - 310.63.42.50.10.001 路 $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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[WTS] 310.30.42.50.01.002 Omega Sapphire Speedmaster 2025 | Complete Box & Papers | $6,699 shipped

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

Omega - 310.30.42.50.01.002 路 $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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