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] 2025 Omega Speedmaster Moonwatch Professional White 42mm 310.30.42.50.04.001 — Excellent Condition, Box & Papers

2025 Omega Speedmaster Moonwatch Professional White 42mm 310.30.42.50.04.001 — Excellent Condition, Box & Papers

Omega - 310.30.42.50.04.001 · $7,500
The Omega Speedmaster Moonwatch Professional White features a striking white lacquered dial, black hands and markers for exceptional legibility, and a classic asymmetrical case with a tachymeter bezel.

  • Condition: Excellent condition with minor signs of wear on clasp and case
  • Case Diameter: 42mm
  • Lug To Lug: 47.5mm
  • Thickness: 13.2mm
Posted at
May 18, 2026, 9:29 AM
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[WTS][US] Omega Speedmaster Moonwatch Professional - Reverse Panda - 42mm - 310.30.42.50.01.004 - Full Set - BRAND NEW

[US] Omega Speedmaster Moonwatch Professional - Reverse Panda - 42mm - 310.30.42.50.01.004 - Full Set - BRAND NEW

Omega - 310.30.42.50.01.004 · $10,650
This Omega Speedmaster Moonwatch Professional features a 42mm case and is in pristine condition with zero hairlines.

  • Condition: Brand new, unworn, and in pristine condition
  • Case Size: 42mm
Posted at
May 18, 2026, 6:09 AM
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[WTS] Omega Speedmaster 38 Co-Axial Chronograph — Box and Papers — Ref. 324.30.38.50.01.001 — Excellent Condition

Omega Speedmaster 38 Co-Axial Chronograph — Box and Papers — Ref. 324.30.38.50.01.001 — Excellent Condition

Omega - 324.30.38.50.01.001 · $5,000
The Omega Speedmaster 38 Co-Axial Chronograph is a discontinued reference with full Speedmaster heritage in a 38mm case, featuring a black tri-register dial and COSC chronometer certification.

  • Condition: Excellent
  • Case size: 38mm
  • Movement: Omega Co-Axial Calibre 3330 - Automatic Chronograph
  • Dial color: Black
Posted at
May 17, 2026, 11:55 PM
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[WTS] Omega Speedmaster Dark Side Of The Moon Pitch Black. Complete set. $7200

Omega Speedmaster Dark Side Of The Moon Pitch Black. Complete set. $7200

Omega - 311.92.44.51.01.004 · $7,200
A bold and ultra-modern take on the iconic Moonwatch, made entirely from sleek black ceramic.

  • Condition: Excellent, mint-tier condition with virtually no signs of wear
  • Case Size: 44.25mm diameter
  • Movement: OMEGA Calibre 9300 Co-Axial Automatic Chronometer with 60-Hour Power Reserve
Posted at
May 17, 2026, 9:42 PM
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[WTS] FIRST ONE WAS GIVEN TO THE PRESIDENT! Rare Vintage 18K Gold Omega Speedmaster “Tribute to Astronauts” Ref BA145.022 - Unpolished Collector Dream!

FIRST ONE WAS GIVEN TO THE PRESIDENT! Rare Vintage 18K Gold Omega Speedmaster “Tribute to Astronauts” Ref BA145.022 - Unpolished Collector Dream!

Omega - BA145.022-69 · $47,500
This is one of the coolest watches ever made, a rare vintage 18K gold Omega Speedmaster 'Tribute to Astronauts' ref BA145.022-69. Only 1014 were made, starting in November 1969, and this is one of them.

  • Condition: Unpolished, all original with incredible patina forming on the gold
  • Dial material: 18K gold
  • Bezel condition: Correct DON (dot over 90) maroon bezel with light wear
  • Case size: 42MM
Posted at
May 17, 2026, 9:26 PM
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[WTS] Rare Vintage Omega Speedmaster Teutonic Hand Wound Gray Dial Ref 145.0044 - $2750 SHIPPED!

Rare Vintage Omega Speedmaster Teutonic Hand Wound Gray Dial Ref 145.0044 - $2750 SHIPPED!

Omega - 145.0044 · $2,750
A rare vintage Omega Speedmaster Teutonic Hand Wound Gray Dial, made for the German market in the early 1980s, characterized by its bead-blasted case and integrated bracelet.

  • Condition: Pre-owned with wear, mostly scratches and nicks on the bezel
  • Case size: 42MM diameter
  • Bezel condition: Ghost with scratches and nicks
  • Crystal type: Sapphire
Posted at
May 17, 2026, 9:15 PM
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[WTS] NEW Omega Speedmaster Pilot 40.85MM Black Dial Steel Bracelet 332.10.41.51.01.002

NEW Omega Speedmaster Pilot 40.85MM Black Dial Steel Bracelet 332.10.41.51.01.002

Omega - 332.10.41.51.01.002
Posted at
May 17, 2026, 7:28 PM
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[WTS] Omega / Speedmaster date / Silver Dial / 40mm / Full Set

Omega / Speedmaster date / Silver Dial / 40mm / Full Set

Omega - 3211.30.00 · $3,250
A silver dial Omega Speedmaster date watch in excellent condition, 40mm in size.

  • Condition: Excellent Condition
  • Case Size: 40mm
Posted at
May 17, 2026, 7:24 PM
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[WTS] Omega Speedmaster Professional Moonwatch 310.30.42.50.01.002 – 2023 – Sapphire – Full Set

Omega Speedmaster Professional Moonwatch 310.30.42.50.01.002 – 2023 – Sapphire – Full Set

Omega - 310.30.42.50.01.002 · $6,799
A manually-wound Omega Speedmaster Professional Moonwatch with a 42mm stainless steel case and black dial, featuring a Master Chronometer certification.

  • Condition: Excellent
  • Case Size: 42mm diameter
  • Water Resistance: unknown
  • Crystal Type: Sapphire
Posted at
May 17, 2026, 6:59 PM
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