Omega Speedmaster Speedmaster Professional Moonwatch

Reference 3870.50.31

About this watch

The Omega Speedmaster Professional Moonwatch (model 3870.50.31) is a masterpiece of watchmaking. This iconic timepiece has been to the moon and back, thanks to its association with the Apollo 11 mission in 1969. At its heart lies the Omega caliber 1861, a hand-wound movement that's both reliable and precise. With a frequency of 21,600 vibrations per hour and a power reserve of 48 hours, this watch is designed to keep you on time for your next adventure. The black dial is elegantly accented by stick and dot indexes, making it both readable and stylish. Its stainless steel case with a round shape and diameter of 42.00 mm exudes sophistication, while the tachymetric bezel adds a sporty edge. Whether you're in a boardroom or at a casual gathering, this watch makes a statement. The Speedmaster's versatility is unmatched, effortlessly transitioning from a dress watch to a casual piece. Pair it with a crisp suit or a relaxed T-shirt, and it fits right in. Its durability and accuracy have made it the perfect companion for astronauts, and its rich heritage is a testament to Omega's engineering prowess.
Buy Now on Jomashop
This is an affiliate link
MSRP: $4,400
Market Price: $4,139

Key Features

  • Omega caliber 1861 hand-wound movement
  • 50-meter water resistance
  • 42mm stainless steel case with black dial
  • Tachymetric bezel
  • Chronograph functionality with small seconds, hours, and minutes hands

Specifications

Brand
Omega
Family
Speedmaster
Model
Speedmaster Professional Moonwatch
Reference
3870.50.31
Movement
1861
Movement Features
  • Small Seconds, Hours, Minutes
  • Chronograph
Case
Stainless Steel 42mm
Dial Color
Black
Crystal
Plexi
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 $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
Active
[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 $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
Active
[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 $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
Active
[WTS] Omega Speedmaster DSOTM - Vintage Edition

Omega Speedmaster DSOTM - Vintage Edition

Omega - 311.92.44.51.01.006 $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
Active
[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 $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
Active
[WTS] Omega Speedmaster 145.022-69 Pre-Moon

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
Active
[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 $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
Active
[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 $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
Active
[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 $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
Active