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 Pro White Dial

Omega Speedmaster Pro White Dial

Omega - 310.32.42.50.04.001 · $6,999
A beautiful Omega Speedmaster Pro with a white dial is up for sale, featuring a manual wind movement and coming as a full kit with card dated 09/2025.

  • Condition: great condition with minimal wear on the case
  • Size: 42mm diameter
  • Movement: 3861 manual wind movement
Posted at
Apr 27, 2026, 9:28 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster. Mother of pearl dial. 39mm. Automatic.

Omega Speedmaster. Mother of pearl dial. 39mm. Automatic.

Omega · $2,100
This Omega Speedmaster features a 39mm automatic movement and a beautiful mother of pearl dial, along with gorgeous lume and an OEM omega strap.

  • Case Size: 39mm diameter
  • Movement Type: Automatic
Posted at
Apr 27, 2026, 6:33 PM
Active
View listing on r/WatchExchange
[WTS] 2025 Omega Speedmaster Silver Snoopy Award Full Set

2025 Omega Speedmaster Silver Snoopy Award Full Set

Omega - 310.32.42.50.02.001 · $15,499
The Omega Speedmaster Silver Snoopy Award 50th Anniversary is a highly sought-after model that celebrates the brand's historic relationship with NASA and commemorates the Silver Snoopy Award presented to Omega in 1970 for its contributions to the Apollo 13 mission.

  • Case size: 42mm
  • Movement: Manual Wind, Omega Caliber 3861 (Master Chronometer Certified)
  • Dial color: Silver with blue accents
Posted at
Apr 27, 2026, 4:08 PM
Active
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[WTS] Omega Speedmaster Moonwatch 3861 Sapphire 310.30.42.50.01.002 ( new / 2026 / box and papers )

Omega Speedmaster Moonwatch 3861 Sapphire 310.30.42.50.01.002 ( new / 2026 / box and papers )

Omega - 310.30.42.50.01.002 · $7,250
This Omega Speedmaster Moonwatch Professional Sapphire is a brand new watch with a stainless steel case and 3861 Omega Master Chronometer Movement.

  • Condition: Brand new
  • Case Size: 42mm diameter
  • Movement: 3861 Omega Master Chronometer
Posted at
Apr 27, 2026, 12:53 PM
Active
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[WTS] Omega Speedmaster Moonwatch 3861 Hesalite 310.30.42.50.01.001 ( new / 2026 / box and papers )

Omega Speedmaster Moonwatch 3861 Hesalite 310.30.42.50.01.001 ( new / 2026 / box and papers )

Omega - 310.30.42.50.01.001 · $6,250
A brand new Omega Speedmaster Moonwatch Professional Hesalite, complete with all boxes and papers.

  • Condition: Brand new
  • Case size: 42mm diameter
  • Movement type: Omega Master Chronometer Movement
Posted at
Apr 27, 2026, 12:46 PM
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[WTS] Omega Speedmaster Professional Moonwatch 310.30.42.50.01.002 Full set

Omega Speedmaster Professional Moonwatch 310.30.42.50.01.002 Full set

Omega - 310.30.42.50.01.002 · $6,200
A fully set Omega Speedmaster Professional Moonwatch in excellent condition, with a rich history and no signs of wear.

  • Condition: Excellent
  • Asking price: $6200 plus shipping
Posted at
Apr 27, 2026, 11:30 AM
Active
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[WTS] Omega Speedmaster Date 3513.30 $2,200

Omega Speedmaster Date 3513.30 $2,200

Omega - 3513.30 · $2,200
The Omega Speedmaster Date features a clean sunburst textured silver dial and a classic polished bezel, running on the Omega 1152 automatic chronograph movement.

  • Condition: Preowned - Good
  • Box and papers: yes, dated October 2006
  • Max wrist size: 7.75 inches
Posted at
Apr 27, 2026, 10:40 AM
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[WTS] Omega Speedmaster 311.30.42.30.01.006 Full Set

Omega Speedmaster 311.30.42.30.01.006 Full Set

Omega - 311.30.42.30.01.006
Full set Omega Speedmaster 311.30.42.30.01.006 for sale.

  • Full set: yes
Posted at
Apr 27, 2026, 9:29 AM
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[WTS] Omega Speedmaster Moonwatch Sapphire Sandwich (310.30.42.50.01.002)

Omega Speedmaster Moonwatch Sapphire Sandwich (310.30.42.50.01.002)

Omega - 310.30.42.50.01.002 · $6,200
A 2022 Omega Speedmaster Moonwatch Sapphire Sandwich, described as overall mint condition, with protective stickers on the case and clasp.

  • Condition: mint condition
  • Year: 2022
  • Box And Papers: yes
Posted at
Apr 27, 2026, 8:50 AM
Active
View listing on r/WatchExchange