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 Reduced Automatic With Peppered Dial Ref. 3510.50.00

Omega Speedmaster Reduced Automatic With Peppered Dial Ref. 3510.50.00

Omega - 3510.50.00 · $2,700
This Omega Speedmaster Reduced features a unique peppered dial that evokes the night sky and gives it a vintage vibe.

  • Condition: Used with minor wear on the bracelet
  • Diameter: 39.7mm
  • Water Resistance: not guaranteed due to age
Posted at
Feb 11, 2026, 2:05 PM
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[WTS] 2022 Omega Speedmaster Moonwatch 42mm 310.30.42.50.01.001 Black Dial - $6,050

2022 Omega Speedmaster Moonwatch 42mm 310.30.42.50.01.001 Black Dial - $6,050

A 2022 Omega Speedmaster Moonwatch Chronograph in stainless steel with a black dial, featuring a Hesalite crystal and a 5-year manufacturer warranty.

Posted at
Feb 11, 2026, 1:49 PM
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[WTS] Omega Speedmaster Professional Moonwatch Full Steel Yellow Patina Original Step Tritium Dial (Unpolished)

Omega Speedmaster Professional Moonwatch Full Steel Yellow Patina Original Step Tritium Dial (Unpolished)

Omega - 145.022-69 · $5,235
This Omega Speedmaster Professional Moonwatch reference 145.022-69 is a strong example of this highly regarded reference. The watch features a black tritium step dial with warm yellow patina and matching tritium hands.

  • Condition: All-original, unpolished condition with excellent overall definition and moderate stretch in the bracelet
  • Case size: 42mm
  • Year: 1969
  • Movement service date: February 2026
Posted at
Feb 11, 2026, 12:50 PM
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[WTS] 2019 Omega Speedmaster Reduced 3510.50.00

2019 Omega Speedmaster Reduced 3510.50.00

Omega - 3510.50.00
2019 Omega Speedmaster Reduced with outer box, inner box, warranty card, and manual. The watch is in very good condition and retail ready.

  • Condition: Very Good
  • Year: 2019
  • Box Status: Retail Ready
  • Case Size: 39mm
Posted at
Feb 10, 2026, 10:30 PM
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[WTS] 2024 Omega Speedmaster Professional Ref 310.30.42.50.04.001 | Complete set | Excellent condition

2024 Omega Speedmaster Professional Ref 310.30.42.50.04.001 | Complete set | Excellent condition

Omega - 310.30.42.50.04.001 · $7,689
Selling a 2024 Omega Speedmaster Professional in excellent condition, with original box and accessories, suitable for daily wear or as a collector's piece.

  • Condition: Excellent / Very Good
  • Box And Outer Packaging: Original
  • Warranty Card Booklets: Omega warranty card & booklets
  • Tags: Included
Posted at
Feb 10, 2026, 10:03 PM
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[WTS] Omega Speedmaster White Dial Co-Axial Chronograph 44.25mm – Ref. 329.30.44.51.04.001 – $5,249 Shipped

Omega Speedmaster White Dial Co-Axial Chronograph 44.25mm – Ref. 329.30.44.51.04.001 – $5,249 Shipped

Omega - 329.30.44.51.04.001 · $5,249
The Omega Speedmaster Chronograph Co-Axial Master Chronometer features a 44.25mm stainless steel case, white dial, ceramic tachymeter bezel, and sapphire crystal with exhibition caseback. Powered by Omega's in-house Co-Axial Master Chronometer Caliber 9900.

  • Condition: Light surface wear, hairlines consistent with normal use; no deep dents or structural damage visible.
  • Case size: 44.25mm
  • Crystal type: Sapphire crystal with exhibition caseback
  • Movement: Omega's in-house Co-Axial Master Chronometer Caliber 9900, METAS certified
Posted at
Feb 10, 2026, 9:31 PM
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[WTS]🔥2026 OMEGA SPEEDMASTER SAPPHIRE SANDWICH BRAND NEW COMPLETE!!🔥

🔥2026 OMEGA SPEEDMASTER SAPPHIRE SANDWICH BRAND NEW COMPLETE!!🔥

OMEGA - 310.30.42.50.01.002 · $7,450
This brand new Omega Speedmaster Sapphire Sandwich features a beautiful black dial and stainless steel case, measuring 42mm in diameter.

  • Condition: BRAND NEW/UNWORN
  • Case Size: 42mm diameter
  • Material: Stainless Steel
Posted at
Feb 10, 2026, 5:39 PM
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[WTS] Omega Speedmaster Professional Moonwatch Hesalire Cal 1861 - Big Box Full Set 2021

Omega Speedmaster Professional Moonwatch Hesalire Cal 1861 - Big Box Full Set 2021

Omega - 311.30.42.30.01.005 · $4,650
The Omega Speedmaster Professional Moonwatch features a Lemania based caliber 1861 movement in a hesalite dome paired with a luminova dial. The watch is accompanied by the Big Box set including an inner travel box, outer protective one, loupe, two nato straps, medallion and loupe.

  • Condition: pre-owned with clean movement, light signs of use and scratches on the clasp
  • Movement: caliber 1861
  • Bracelet size: 42 x 20mm
  • Case material: hesalite
Posted at
Feb 10, 2026, 3:52 PM
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[WTS] Omega Speedmaster Professional - Reverse Panda (ref. 310.30.42.50.01.004) - 2026 Brand New

Omega Speedmaster Professional - Reverse Panda (ref. 310.30.42.50.01.004) - 2026 Brand New

Omega - 310.30.42.50.01.004 · $11,000
The Omega Speedmaster Professional Reverse Panda is a brand new release with a unique dial that 'pops' in person.

  • Condition: Brand New
  • Release year: 2026
  • Status: Full set
Posted at
Feb 10, 2026, 3:28 PM
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