Omega Speedmaster Speedmaster Professional Moonwatch 3861 Sedna Gold - Ruby / Black - Ruby / Bracelet

Reference 310.55.42.50.51.001

Omega Speedmaster Professional Moonwatch 3861 Sedna Gold - Ruby / Black - Ruby / Bracelet

About this watch

The Omega Speedmaster Professional Moonwatch 3861 Sedna Gold is a stunning blend of luxury and functionality, with its Sedna gold construction and intricate chronograph features. The watch's sheer elegance is undeniable, with a black sunburst finish contrasting beautifully with gem-set indexes and ruby accents. Certified as a Master Chronometer by METAS, the Omega caliber 3861 movement is an engineering marvel, resistant to magnetic fields up to 15,000 gauss. With small seconds, hours, and minutes hands, the chronograph functionality offers precision timing. The watch's durability is also noteworthy, with sapphire glass adding scratch resistance. The Sedna gold bracelet ensures a secure fit, while its adjustability makes it comfortable for wearers of all wrist sizes. This timepiece is not just a luxury item but a conversation starter, status symbol, and piece of horological history.
Buy Now on Jomashop
This is an affiliate link

Key Features

  • Omega caliber 3861 movement with Co-Axial escapement and silicon balance spring
  • Sedna gold construction with gem-set indexes and ruby accents
  • 50m water resistance with sapphire glass scratch resistance
  • Chronograph functionality with small seconds, hours, and minutes hands
  • Adjustable Sedna gold bracelet for secure fit on all wrist sizes

Specifications

Brand
Omega
Family
Speedmaster
Model
Speedmaster Professional Moonwatch 3861 Sedna Gold - Ruby / Black - Ruby / Bracelet
Reference
310.55.42.50.51.001
Movement
3861
Movement Features
  • Small Seconds, Hours, Minutes
  • Chronograph
  • Chronometer
Case
Sedna Gold 42mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
50

Current Listings

[WTS] 2023 Omega Speedmaster Moonwatch 42mm Moonshine Gold Green 310.60.42.50.10.001 Full Set

2023 Omega Speedmaster Moonwatch 42mm Moonshine Gold Green 310.60.42.50.10.001 Full Set

Omega - 310.60.42.50.10.001 · $29,200
2023 Omega Speedmaster Moonwatch 42mm Moonshine Gold Green, a manual wind mechanical watch in very good condition.

  • Condition: Very nice preowned condition with some light scratches on the case and bracelet
  • Case Dimensions: 42mm diameter
  • Movement: Manual Wind, Mechanical
  • Original Purchase Date: September 2023
Posted at
Feb 4, 2026, 8:13 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster Pilot 332.10.41.51.01.002

Omega Speedmaster Pilot 332.10.41.51.01.002

Omega - 332.10.41.51.01.002 · $8,000
This Omega Speedmaster Pilot is a brand new, still stickered model from 2025.

  • Condition: new, unworn, unsized
  • Year of production: 2025
Posted at
Feb 4, 2026, 7:41 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster Dark Side of The Moon 44.25mm 311.92.44.51.01.007 | 2021 Complete Set w/ 2 Straps

Omega Speedmaster Dark Side of The Moon 44.25mm 311.92.44.51.01.007 | 2021 Complete Set w/ 2 Straps

Omega - 311.92.44.51.01.007 · $6,975
A 2021 Omega Speedmaster Dark Side of The Moon in 44.25mm size, featuring two OEM straps and a complete set with inner and outer boxes.

  • Condition: Great Pre-Owned Condition
  • Case Size: 44.25mm
  • Service History: Unknown
  • Serial Number: 340+ AMP
Posted at
Feb 4, 2026, 6:42 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster Reduced 3510.50

Omega Speedmaster Reduced 3510.50

Omega - 3510.50 · $2,550
For sale is an Omega Speedmaster Reduced 3510.50 in really great condition, with no major signs of wear, and running great.

  • Condition: really great condition
  • Payment Methods Accepted: pretty much every payment method including crypto
  • No Paypal: true
  • Trade Acceptable Brands: Tudor, Cartier, Rolex, Omega, Breitling, AP
Posted at
Feb 4, 2026, 3:43 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster 324.23.38.50.02.001 38mm Co-Axial

Omega Speedmaster 324.23.38.50.02.001 38mm Co-Axial

Omega - 324.23.38.50.02.001 · $4,450
For sale is a super clean Omega Speedmaster with a unique gold and green bezel, sitting on a green leather strap.

  • Condition: Excellent
  • Case Size: 38mm diameter
  • Bezel Color: gold and green
Posted at
Feb 4, 2026, 3:36 PM
Active
View listing on r/WatchExchange
[WTS] 2021 Omega Speedmaster Moonwatch 42mm 310.30.42.50.01.001 Stainless Steel Black Dial - $5,900

2021 Omega Speedmaster Moonwatch 42mm 310.30.42.50.01.001 Stainless Steel Black Dial - $5,900

Omega - 310.30.42.50.01.001 · $5,900
This is a 2021 Omega Speedmaster Moonwatch Chronograph with a stainless steel black dial and Hesalite crystal.

  • Condition: Excellent overall condition
  • Box: Original Double Omega boxed
  • Papers: Yes (Box and Papers)
  • Warranty: 5 year manufacturer warranty
Posted at
Feb 4, 2026, 3:08 PM
Active
View listing on r/WatchExchange

2021 Omega Speedmaster Moonwatch 42mm 310.30.42.50.01.001 Stainless Steel Black Dial - $5,900

Omega - 310.30.42.50.01.001 · $5,900
2021 Omega Speedmaster Moonwatch in stainless steel with a black dial and 42mm case size.

  • Case size: 42mm
Posted at
Feb 4, 2026, 3:06 PM
Active
View listing on r/WatchExchange
[WTS] Selling my Omega Speedmaster Professional Moonwatch Hesalite 311.33.42.30 with big box asking $3999 CONUS + shipping

Selling my Omega Speedmaster Professional Moonwatch Hesalite 311.33.42.30 with big box asking $3999 CONUS + shipping

Omega - Speedmaster Professional Moonwatch Hesalite 311.33.42.30 · $3,999
Recently purchased Omega Speedmaster Professional Moonwatch Hesalite, in good condition, with a beautifully repaired leather strap. The watch runs well and keeps time accurately.

  • Condition: good condition, minor damage on leather strap
  • Leather strap condition: minor damage with visible repair
  • Strap included: no
Posted at
Feb 4, 2026, 12:26 PM
Active
View listing on r/WatchExchange

2022 Omega Speedmaster Moonwatch Sapphire 42mm 310.30.42.50.01.002 Mint Complete

Omega - 310.30.42.50.01.002 · $6,195
This 2022 Omega Speedmaster Moonwatch Sapphire 42mm is a first watch worn on the moon, featuring photos and a video on the seller's website.

  • Condition: Minty fresh
  • Case size: 42mm
  • Year: 2022
  • Contents: watch,inner & outer boxes,warranty card,pictogram,master chronometer,instruction booklet,black travel case,hang tag,cleaning cloth,Moonwatch Booklet
Posted at
Apr 7, 2025, 2:59 PM
Active
View listing on RolexForums