Omega Speedmaster Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet

Reference 310.55.42.50.13.001

About this watch

The Omega Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet is a masterpiece of horology, blending art, history, and cutting-edge technology. Crafted from Sedna Gold, this watch boasts a unique color that's both warm and striking. Its round shape and sunburst brown finish give it a luxurious feel, while the diamond-set bezel adds a touch of elegance. The 3861 is equipped with a chronograph feature, allowing you to measure elapsed time with precision. At its heart lies the Omega caliber 3861, an updated version of the legendary caliber 861/1861, featuring a co-axial escapement and silicon balance spring for accuracy and reliability. Master Chronometer certified by METAS, this watch has undergone rigorous testing to withstand magnetic fields of up to 15,000 gauss. Its sleek design and exceptional craftsmanship make it a standout in any collection. Whether you're at a formal event or a casual outing, this watch is sure to turn heads.
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Key Features

  • Sedna Gold case
  • Manual-winding chronograph movement
  • Co-axial escapement and silicon balance spring
  • Master Chronometer certified by METAS
  • Diamond-set bezel
  • Water resistance up to 50 meters
  • 42.00 mm diameter and 13.18 mm height

Specifications

Brand
Omega
Family
Speedmaster
Model
Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet
Reference
310.55.42.50.13.001
Movement
3861
Movement Features
  • Small Seconds, Hours, Minutes
  • Chronograph
  • Chronometer
Case
Sedna Gold 42mm
Dial Color
Brown
Crystal
Sapphire
Water Resistance
50

Current Listings

Omega Speedmaster Moonwatch Sapphire - 3861 - 310.30.42.50.01.002 (new / 2025)

Omega Speedmaster Moonwatch Sapphire - 3861 - 310.30.42.50.01.002 (new / 2025)

This Omega Speedmaster Moonwatch Professional features a 42mm stainless steel case and is powered by the 3861 Omega Master Chronometer Movement.

  • Condition: Brand new
  • Case size: 42mm
  • Movement type: 3861 Omega Master Chronometer
Posted at
Apr 4, 2025, 2:52 PM
Active
Omega Speedmaster Moonwatch Hesalite - 3861 - 310.30.42.50.01.001 (new / 2025)

Omega Speedmaster Moonwatch Hesalite - 3861 - 310.30.42.50.01.001 (new / 2025)

A brand new Omega Speedmaster Moonwatch Professional Hesalite with a stainless steel case and 3861 Omega Master Chronometer movement.

  • Condition: Brand new
  • Case size: 42mm diameter
  • Movement: Omega Master Chronometer
Posted at
Apr 4, 2025, 2:52 PM
Active
>>REDUCED<< OMEGA SPEEDMASTER PROFESSIONAL 1974 Stepped Dial

>>REDUCED<< OMEGA SPEEDMASTER PROFESSIONAL 1974 Stepped Dial

Omega - 145.022 · $3,450
A 1974 Omega Speedmaster Professional with a stepped dial, manual winding chronograph movement (calibre 861), and tritium indices in superb condition.

  • Condition: Very good vintage condition
  • Diameter: 42 mm
  • Bracelet: Omega Speedmaster 1125 bracelet with 516 end links
  • Movement: Manual winding chronograph calibre 861
Posted at
Apr 4, 2025, 2:15 PM
Active
NEW 2021 Omega Speedmaster "Ed White" 39.7mm 311.30.40.30.01.001 Black Dial

NEW 2021 Omega Speedmaster "Ed White" 39.7mm 311.30.40.30.01.001 Black Dial

The Omega Speedmaster 'Ed White' is a nod to the version worn by Ed White, featuring a black step dial and vintage-style applied logo.

  • Condition: New with minor scratches from handling
  • Diameter: 39.7mm
  • Box And Papers: Yes
Posted at
Apr 3, 2025, 11:11 AM
Active
Omega Speedmaster Automatic 3510.50 39mm

Omega Speedmaster Automatic 3510.50 39mm

Omega - 3510.50 · $1,850
a discontinued Omega Speedmaster Reduced model from 1998, featuring an automatic self-winding movement and a black dial with luminous hands and markers.

  • Condition: Good
  • Movement type: Automatic self-winding
  • Crystal material: Hesalite
Posted at
Apr 2, 2025, 3:18 PM
Active
Omega Speedmaster Moonwatch Sapphire - 3861 - 310.30.42.50.01.002 (excellent)

Omega Speedmaster Moonwatch Sapphire - 3861 - 310.30.42.50.01.002 (excellent)

This Omega Speedmaster Moonwatch Professional is a stainless steel watch with a 42mm case, featuring an Omega Master Chronometer movement.

  • Condition: Excellent
  • Case size: 42mm
  • Movement type: Omega Master Chronometer
Posted at
Apr 2, 2025, 3:09 PM
Active
Omega 31062425099001 Speedmaster Moon watch 18K Yellow Gold

Omega 31062425099001 Speedmaster Moon watch 18K Yellow Gold

Omega - 31062425099001 · $22,795
The Omega Speedmaster Moon watch is a Professional Moonshine model with an 18K yellow gold case on a rubber strap. It features a manual wind movement, 12-hour chronograph, and display caseback.

  • Material: 18K Yellow Gold
  • Movement: Omega caliber 3861
  • Diameter: 42mm
Posted at
Mar 31, 2025, 10:39 PM
Active
OMEGA Speedmaster '57 Blue Chronograph Dial Steel Men's Watch 332.10.41.51.03.001

OMEGA Speedmaster '57 Blue Chronograph Dial Steel Men's Watch 332.10.41.51.03.001

Omega Speedmaster '57 Blue Chronograph Dial Steel Men's Watch, purchased in 2024 with original AD receipt and box.

  • Condition: Excellent
  • Box: yes
  • Papers: original AD receipt
Posted at
Mar 31, 2025, 6:57 PM
Active
Omega Speedmaster - FOIS - 310.30.40.50.06.001 ( excellent / 2024 )

Omega Speedmaster - FOIS - 310.30.40.50.06.001 ( excellent / 2024 )

This Omega Speedmaster FOIS is a 39.7mm stainless steel case watch with the 3861 Calibre. It comes with all original boxes, papers, booklets, and an Omega Warranty Card dated November 2024.

  • Condition: Excellent condition
  • Case size: 39.7mm
  • Movement: Omega 3861 Calibre
Posted at
Mar 28, 2025, 3:40 PM
Active