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 - 3510.50 - AMAZING Patina - Bonus Omega Buckle on Strap - $2,650 Shipped

Omega Speedmaster Reduced - 3510.50 - AMAZING Patina - Bonus Omega Buckle on Strap - $2,650 Shipped

Omega - 3510.50 · $2,650
The Omega Speedmaster Reduced is a stylish and elegant watch with beautiful patina.

  • Patina: amazing
Posted at
May 27, 2026, 11:00 PM
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[WTS] Omega Speedmaster 3523.80 39mm - $1,950

Omega Speedmaster 3523.80 39mm - $1,950

Omega - 3523.80 · $1,950
Up for sale is my Omega Speedmaster 3523.80 39mm in great condition.

  • Condition: great condition for its age
  • Movement: automatic caliber Omega 1151
  • Bracelet size: 7-7.25 inch wrists
Posted at
May 27, 2026, 9:24 PM
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[WTS] 2024 Omega Speedmaster Professional Moonwatch White Dial 310.30.42.50.04.001 Full Set

2024 Omega Speedmaster Professional Moonwatch White Dial 310.30.42.50.04.001 Full Set

Omega - 310.30.42.50.04.001 · $7,615
2024 Omega Speedmaster Professional Moonwatch with a stainless steel case, 42mm diameter, and manual wind movement.

  • Condition: Very Nice Preowned with Some Small Light Scratches on the Case, Bracelet and Buckle
  • Case dimensions: 42mm diameter
  • Bezel material: Stainless Steel Black Bezel
  • Band type: Stainless Steel Bracelet with Micro Adjustment
Posted at
May 27, 2026, 8:06 PM
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[WTS] Omega Speedmaster Professional 3861 "Sapphire Sandwich" (Ref. 310.30.42.50.01.002) adjustable clasp

Omega Speedmaster Professional 3861 "Sapphire Sandwich" (Ref. 310.30.42.50.01.002) adjustable clasp

Omega - 310.30.42.50.01.002 · $5,900
The Omega Speedmaster Professional 3861 'Sapphire Sandwich' is a highly sought-after chronograph configuration that demands a physical relationship with its mechanical intimacy. The watch features a crisp, metallic ratcheting resonance from the Caliber 3861 and a massive edge-to-edge sapphire caseback offering a mesmerizing view of the movement.

  • Condition: Lightly worn, very sharp lines, flawless finishes, immaculate aluminum tachymeter bezel
  • Bracelet type: Stainless steel
  • Bracelet width tapering: 20mm -> 15mm
  • Movement function: Manual-wind
Posted at
May 27, 2026, 6:56 PM
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[WTS] Omega Speedmaster Co-axial Chronograph | Ref: 324.30.38.50.01.001 | w/ Box & Papers | $4200

Omega Speedmaster Co-axial Chronograph | Ref: 324.30.38.50.01.001 | w/ Box & Papers | $4200

Omega - 324.30.38.50.01.001 · $4,200
This Omega Speedmaster Co-axial Chronograph is a high-end watch that features a chronograph function, making it ideal for those who need to measure elapsed time.

  • Box: included
  • Papers: included
Posted at
May 27, 2026, 6:26 PM
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[WTS] Omega Speedmaster Chronoscope Co-Axial Master Chronometer Chronograph | Ref. 329.30.43.51.02.002 | w/ Box & Papers | $6300

Omega Speedmaster Chronoscope Co-Axial Master Chronometer Chronograph | Ref. 329.30.43.51.02.002 | w/ Box & Papers | $6300

Omega - 329.30.43.51.02.002 · $6,300
a Omega Speedmaster Chronoscope Co-Axial Master Chronometer Chronograph is listed for sale.

Posted at
May 27, 2026, 6:06 PM
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[WTS] Omega Speedmaster Professional 42MM White - Ref 310.30.42.50.04.001 (LIKE NEW 2025 COMPLETE SET W/ CASEBACK STICKER)

Omega Speedmaster Professional 42MM White - Ref 310.30.42.50.04.001 (LIKE NEW 2025 COMPLETE SET W/ CASEBACK STICKER)

Omega - 310.30.42.50.04.001 · $7,400
A 42MM Omega Speedmaster Professional White, in pristine condition with its original caseback sticker intact and dated warranty card from 2025.

  • Condition: like new
  • Case diameter: 42mm
  • Depth rating: 30m
Posted at
May 27, 2026, 4:18 PM
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[WTS] Omega Speedmaster Professional Sapphire - 310.30.42.50.01.002 - Full Kit - Fresh Service

Omega Speedmaster Professional Sapphire - 310.30.42.50.01.002 - Full Kit - Fresh Service

Omega - 310.30.42.50.01.002 · $6,595
The Omega Speedmaster Professional features a sapphire crystal front and display caseback, showcasing the Omega movement.

  • Condition: Near like-new, lightly pre-owned
  • Case size: 42mm
  • Water resistance: not specified
Posted at
May 27, 2026, 4:15 PM
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[WTS] Omega Speedmaster Reduced Reverse Panda 1993 Ref 3511.50

Omega Speedmaster Reduced Reverse Panda 1993 Ref 3511.50

Omega - 3511.50 · $1,950
A 1993 Omega Speedmaster Reduced sold as a pre-owned item, with the original box but no papers.

  • Condition: Used with damage to the bezel
  • Year of manufacture: 1993
  • Papers: No papers included
Posted at
May 27, 2026, 3:02 PM
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