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

Reference 310.55.42.50.13.001

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

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

[WTS] Omega Speedmaster Moonwatch 3861 Hesalite – $3800

Omega Speedmaster Moonwatch 3861 Hesalite – $3800

Omega - 3861 · $3,800
  • Hesalite crystal: present instead of sapphire
Posted at
Apr 25, 2026, 2:49 PM
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[WTS] 2025 Omega Speedmaster 38 324.23.38.50.02.001 Gold Full Set B&P - $5,995.00

2025 Omega Speedmaster 38 324.23.38.50.02.001 Gold Full Set B&P - $5,995.00

Omega - 324.23.38.50.02.001 · $5,995
2025 Omega Speedmaster 38 in gold, includes full set and B&P.

  • Water resistance: 30m depth rating
Posted at
Apr 25, 2026, 12:20 PM
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[WTS] Omega Speedmaster Date 3211.31 COMPLETE SET + OEM BRACELET

Omega Speedmaster Date 3211.31 COMPLETE SET + OEM BRACELET

Omega - 3211.31 · $2,750
For sale is an Omega Speedmaster Date in amazing condition, complete set including warranty card and original speedmaster bracelet.

  • Condition: amazing condition with hardly any wear
  • Bracelet type: OEM
  • Payment methods accepted: crypto, cash, etc.
  • Location: southwest FL
Posted at
Apr 25, 2026, 12:19 PM
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[WTS] 2021 Omega Speedmaster Racing 329.32.44.51.01.001 Orange Full Set - $6,495

2021 Omega Speedmaster Racing 329.32.44.51.01.001 Orange Full Set - $6,495

Omega - 329.32.44.51.01.001 · $6,495
A 2021 Omega Speedmaster Racing in excellent condition, featuring a racing design and available as a full set with various accessories.

  • Condition: Excellent condition with minimal signs of wear
  • Size: 40mm diameter
  • Year: 2021
Posted at
Apr 25, 2026, 9:40 AM
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[WTS] Omega Speedmaster Grey Side of the Moon 311.93.44.51.99.001 Full Set $7,200

Omega Speedmaster Grey Side of the Moon 311.93.44.51.99.001 Full Set $7,200

Omega - 311.93.44.51.99.001 · $7,200
A modern and highly distinctive take on the Speedmaster line featuring a full grey ceramic case and matching dial.

  • Condition: Excellent (pre-owned, minimal wear)
  • Case Size: 44.25mm diameter
  • Case Material: Grey ceramic
  • Movement: Automatic chronograph (Omega Co-Axial Calibre 9300)
Posted at
Apr 25, 2026, 9:37 AM
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[WTS] Omega Speedmaster Professional White, 2024 $7k

Omega Speedmaster Professional White, 2024 $7k

Omega - 310.30.42.50.04.001 · $7,000
This Omega Speedmaster Professional White is a pre-owned watch with a reference number of 310.30.42.50.04.001, featuring a white color scheme.

  • Condition: Preowned
  • Shipping Cost: $150 (USA shipping)
  • Payment Methods: Wire or Credit Card (+4.9% & 4 days clearance)
  • Warranty Type: 2024 Warranty
Posted at
Apr 25, 2026, 8:52 AM
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[WTS] (Rare) (Serviced) Omega Speedmaster Reduced Mother of Pearl Dial Watch 39mm 3534.71 $2,400

(Rare) (Serviced) Omega Speedmaster Reduced Mother of Pearl Dial Watch 39mm 3534.71 $2,400

Omega - 3534.71 · $2,400
This Omega Speedmaster Reduced features a mother of pearl dial and is 39mm in size.

  • Condition: Light scratches from normal use, recently serviced
  • Case Size: 39mm
Posted at
Apr 25, 2026, 8:35 AM
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[WTS] Omega Speedmaster Moonwatch 310.30.42.50.04.001 Box and Papers, 2024, $7500

Omega Speedmaster Moonwatch 310.30.42.50.04.001 Box and Papers, 2024, $7500

Omega - 310.30.42.50.04.001 · $7,500
The Omega Speedmaster Moonwatch features a 42mm diameter, 50m water resistance, and 50 hour power reserve with chronograph functionality.

  • Condition: Dial and crystal are clean, Case and caseback are clean, Bracelet is excellent but clasp has hairline scratches
  • Water Resistance: 50m depth rating
  • Case Size: 42mm diameter
  • Power Reserve: 50 hours
Posted at
Apr 24, 2026, 11:24 PM
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[WTS] Omega speedmaster reduced

Omega speedmaster reduced

Omega - 3510.50 · $2,500
Up for sale is my Omega Speedmaster Reduced from the mid 1990s, which comes in a stainless steel case with a black dial and automatic chronograph.

  • Condition: Great condition for its age, with patina
  • Case size: 39mm
  • Bracelet type: Stainless steel and Uncle's flat link bracelet
  • Bracelet material: Stainless steel
Posted at
Apr 24, 2026, 10:59 PM
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