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

Reference 310.55.42.50.51.001

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

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This is a rare vintage 18K gold Omega Speedmaster 'Tribute to Astronauts' ref BA145.022 Unpolished Collector Grade watch, one of only 1014 made starting in November of 1969.

  • Condition: Collector grade, unpolished all original with incredible patina forming on the gold
  • Case size: 42mm
  • Diameter: 42mm
  • Bezel condition: Correct DON (dot over 90) maroon bezel with light wear mostly seen on the edge
Posted at
May 3, 2026, 10:31 PM
Active
[WTS] Omega Speedmaster Reduced 3510.21 Limited Edition (2,000 Pcs) Marui 39mm , B&P  - $5,550

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  • Condition: Very good condition
  • Case size: 39mm diameter
  • Movement type: Automatic
Posted at
May 3, 2026, 8:39 PM
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  • Condition: Excellent vintage condition
  • Warranty Card Origin: Kimuraya in Yokohama, Japan
  • Service History: Recently serviced
  • Timegrapher Results: Deadman's line on timegrapher, 300 amplitude, all zeros without a single blimp out of place
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May 3, 2026, 8:27 PM
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[WTS] Omega Speedmaster Apollo 17

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  • Condition: good
  • Production Run: only 1972 pieces ever made
  • Wrist Fits: 7.3 inches
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May 3, 2026, 7:38 PM
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[WTS] Omega Speedmaster Professional Moonwatch Hesalite 3861 — 2022

Omega Speedmaster Professional Moonwatch Hesalite 3861 — 2022

Omega - 3861 · $60,000
a luxury watch, Omega Speedmaster Professional Moonwatch Hesalite edition from 2022

  • Year: 2022
Posted at
May 3, 2026, 4:44 PM
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[WTS] Omega Speedmaster Moonphase 2024 Complete Set Blue Ceramic Mint Condition

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The Omega Speedmaster Moonphase is a modern execution of the flagship model, featuring full blue ceramic construction and a stunning dial. It's lightweight, technical, and visually unique in the Speedmaster lineup. The watch feels special on the wrist.

  • Condition: Mint Condition
  • Case material: Blue Ceramic
  • Dial color: stunning
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May 3, 2026, 2:12 PM
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[WTS] Omega Speedmaster Professional Moonwatch Ref: 311.30.42.30.01.005

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  • Condition: Very Good
  • Case size: 42mm
  • Movement: 1861 movement
Posted at
May 3, 2026, 1:29 PM
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[WTS] Omega Speedmaster 39mm. Triple Date. Automatic..

Omega Speedmaster 39mm. Triple Date. Automatic..

A 39mm Omega Speedmaster with triple date and automatic movement.

  • Shipping: from NJ USA
  • Additional Pictures: available on dropbox
Posted at
May 3, 2026, 9:51 AM
Active