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.
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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] OMEGA Speedmaster "Silver Snoopy Award" 50th Bracelet 310.32.42.50.02.001 $14000

OMEGA Speedmaster "Silver Snoopy Award" 50th Bracelet 310.32.42.50.02.001 $14000

OMEGA - 310.32.42.50.02.001 · $14,000
This is a limited-edition Omega Speedmaster 'Silver Snoopy Award' 50th Anniversary Series watch that pays tribute to OMEGA's contributions to space exploration. It features a unique caseback and comes with various accessories.

  • Condition: Very good, with no noticeable markings on the crystal or bezel
  • Case Size: 42mm
  • Bracelet Type: stainless steel
  • Straps Included: nylon strap,stainless bracelet
Posted at
Feb 13, 2026, 6:43 PM
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[WTS] Omega Speedmaster DSOTM Dark Side Of The Moon Black Zirconium Ceramic 311.92.44.51.01.003

Omega Speedmaster DSOTM Dark Side Of The Moon Black Zirconium Ceramic 311.92.44.51.01.003

Omega - 311.92.44.51.01.003 · $6,100
One of the sickest versions of the Speedmaster, with a blacked out design and a dial that still pops out.

  • Condition: Immaculate
  • Straps: 3 (2 OEM, 1 AM strap)
  • Box and papers included: true
Posted at
Feb 13, 2026, 4:59 PM
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[WTS] Omega Speedmaster Broad Arrow - White Dial + Blued Hands - 42mm - 321.10.42.50.02.001

Omega Speedmaster Broad Arrow - White Dial + Blued Hands - 42mm - 321.10.42.50.02.001

Omega - 321.10.42.50.02.001 · $4,150
This Omega Speedmaster Broad Arrow features a white dial and blued hands, housed in a 42mm case.

  • Condition: Fantastic condition with minor hairlines on bracelet, case, and clasp
  • Case size: 42mm
Posted at
Feb 13, 2026, 2:55 PM
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[WTS] Omega Speedmaster Moonwatch Professional - White Dial - 310.30.42.50.04.001 - Full Set - BRAND NEW

Omega Speedmaster Moonwatch Professional - White Dial - 310.30.42.50.04.001 - Full Set - BRAND NEW

Omega - 310.30.42.50.04.001 · $8,175
A brand-new Omega Speedmaster Moonwatch Professional with a white dial is up for sale, featuring a pristine condition and functioning perfectly mechanically.

  • Condition: Brand new, unworn
  • Case materials: Stainless steel
  • Bracelet material: Stainless steel
Posted at
Feb 13, 2026, 2:45 PM
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[WTS] Omega Speedmaster Blue moonphase 304.33.44.52.03.001

Omega Speedmaster Blue moonphase 304.33.44.52.03.001

Omega - 304.33.44.52.03.001 · $6,999
This Omega Speedmaster features a blue dial with moonphase display, and comes with its original box, papers, manual, and strap.

  • Condition: In great shape
  • Water Resistance: 30m
Posted at
Feb 13, 2026, 1:29 PM
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[WTS] Omega Speedmaster GMT 231.10.43.52.06.001 – Full Set – Grey Dial – 2014 – $3,850

Omega Speedmaster GMT 231.10.43.52.06.001 – Full Set – Grey Dial – 2014 – $3,850

Omega - 231.10.43.52.06.001 · $3,850
A sharp, highly versatile Speedmaster with excellent wrist presence and everyday wearability.

  • Condition: Good condition
  • Year: 2014 production
  • Bracelet material: Stainless steel
  • Dial color: Grey dial
Posted at
Feb 13, 2026, 1:06 PM
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[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 · $4,250
The Omega Speedmaster 324.23.38.50.02.001 features a unique gold and green bezel, sits on a green leather strap with quick release function, and is in excellent condition from 2024.

  • Condition: Excellent condition
  • Diameter: 38mm
  • Strap material: Green leather
Posted at
Feb 13, 2026, 1:02 PM
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[WTS] Omega Speedmaster Reduced - 39mm Two Tone - Ref 175.0033 - Price Reduced!

Omega Speedmaster Reduced - 39mm Two Tone - Ref 175.0033 - Price Reduced!

Omega - 175.0033 · $2,695
A beautiful Omega Speedmaster Reduced with a white dial and 39mm two-tone design, featuring all working functions and a high-quality leather AM strap from Casanova.

  • Condition: great vintage condition, light hairlines on bezel and case
  • Case size: 39mm
  • Band: high quality leather AM strap from Casanova
Posted at
Feb 13, 2026, 1:01 PM
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[wts] Omega Speedmaster Moonwatch Professional Hesalite, 2025, full big box, $5800

Omega Speedmaster Moonwatch Professional Hesalite, 2025, full big box, $5800

Omega - 310.32.42.50.01.001 · $5,800
This Omega Speedmaster Moonwatch Professional features the Co-Axial Master Chronometer Caliber 3861, has a stainless steel case with Hesalite crystal, and comes in its full big box set. It is manual wind, METAS certified, and has 50 meters water resistance.

  • Condition: mint condition
  • Case size: 42mm
  • Water resistance: 50m
  • Crystal type: Hesalite
Posted at
Feb 13, 2026, 11:22 AM
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