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

[WTS]🔥OMEGA SPEEDMASTER SAPPHIRE SANDWICH 310.30.42.50.01.002 COMPLETE 1/2026 BRAND NEW/UNWORN🔥

🔥OMEGA SPEEDMASTER SAPPHIRE SANDWICH 310.30.42.50.01.002 COMPLETE 1/2026 BRAND NEW/UNWORN🔥

This is a brand new, unworn Omega Speedmaster Sapphire Sandwich watch with a beautiful black dial and stainless steel case.

  • Condition: BRAND NEW/UNWORN
  • Case material: Stainless Steel
  • Case size: 42mm diameter
Posted at
Jan 19, 2026, 8:20 PM
Active
[WTS] Omega Speedmaster. Broadarrow. Automatic. Gorgeous Dial. Blue Hands, Indices. Strong Lume.

Omega Speedmaster. Broadarrow. Automatic. Gorgeous Dial. Blue Hands, Indices. Strong Lume.

Omega - 3551.20 · $3,550
This Omega Speedmaster features a broadarrow dial, automatic movement, and blue hands and indices with strong lume.

  • Shipping: Fedex with insurance
Posted at
Jan 19, 2026, 7:31 PM
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[WTS] Omega Speedmaster Pilot 332.10.41.51.01.002

Omega Speedmaster Pilot 332.10.41.51.01.002

The Omega Speedmaster Pilot is a new, unworn watch still in its original packaging with stickers intact.

  • Year: 2025
  • Status: new/unworn
Posted at
Jan 19, 2026, 7:16 PM
Active
[WTS] 2025 Omega Moonwatch Professional Speedmaster Sapphire Sandwich. Full set! Near New! 310.30.42.50.01.002

2025 Omega Moonwatch Professional Speedmaster Sapphire Sandwich. Full set! Near New! 310.30.42.50.01.002

A 2025 Omega Moonwatch Professional Speedmaster Sapphire Sandwich, considered a classic collectors piece with very light hairlines on the clasp. It's been worn only three times and comes with all original packaging.

  • Condition: Near New
  • Worn: 3 times
  • Retail price now: 9k
Posted at
Jan 19, 2026, 1:25 PM
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[WTS] Omega Speedmaster FOIS Anniversary Edition 310.30.40.50.06.001Box and Papers 2024 Good Condition - $6900 + 🏷️

Omega Speedmaster FOIS Anniversary Edition 310.30.40.50.06.001Box and Papers 2024 Good Condition - $6900 + 🏷️

This is the anniversary edition for the First Omega in Space Speedmaster, sharing the performance and DNA of an Omega Speedmaster Professional with the same 3861 movement. The watch features chronograph hands contrasting with the watch hands, making it a beautiful conversation piece.

  • Condition: Good Condition
  • Box And Papers: yes
  • Movement: 3861
  • Bracelet Links: spare links
Posted at
Jan 19, 2026, 11:23 AM
Active
[WTS] Omega Speedmaster Aqua Terra 38mm Full Set

Omega Speedmaster Aqua Terra 38mm Full Set

Omega - Aqua Terra 38mm · $4,250
Beautiful Omega Aqua Terra 38mm up for sale. It has a protective film on the case and bracelet, adding scratch protection.

  • Condition: Good pre-owned condition
  • Bracelet length: 6.75in
  • Strap material: rubber
  • Box contents: Inner and Outter Box, cards, tag, OEM bracelet, another set of WatchShell film and tweezers
Posted at
Jan 19, 2026, 10:52 AM
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[WTS] Omega Speedmaster Automatic Schumacher Ref. 3810.61.41 - $2995

Omega Speedmaster Automatic Schumacher Ref. 3810.61.41 - $2995

Omega - 3810.61.41 · $2,995
The Omega Speedmaster Automatic Schumacher Ref. 3810.61.41 is a unique limited edition watch.

  • Schumacher edition: limited edition
Posted at
Jan 19, 2026, 9:40 AM
Active
[WTS][US] Omega Speedmaster Broad Arrow - White Dial - 42mm - 3551.20.00 - Full Set

[US] Omega Speedmaster Broad Arrow - White Dial - 42mm - 3551.20.00 - Full Set

Omega - 3551.20.00 · $4,100
This Omega Speedmaster Broad Arrow features a white dial and 42mm case, coming in full set with watch, box, manuals, and triple cards.

  • Condition: Fantastic condition with minor hairlines on bracelet, case, and clasp
  • Case Diameter: 42mm
  • Year: 2006
Posted at
Jan 19, 2026, 8:51 AM
Active
[WTS] Omega Speedmaster ’57 Gold on Leather Strap 2025 MINT FULL 331.22.42.51.01.001

Omega Speedmaster ’57 Gold on Leather Strap 2025 MINT FULL 331.22.42.51.01.001

The Omega Speedmaster ’57 Gold on Leather Strap is a luxury watch for sale. The details of the watch are still coming, but it appears to be in mint condition.

  • Condition: MINT FULL
Posted at
Jan 18, 2026, 10:07 PM
Active