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] (Reserved for u/vohms) Omega Speedmaster Moonwatch White Dial

(Reserved for u/vohms) Omega Speedmaster Moonwatch White Dial

Omega - Speedmaster Moonwatch · $7,800
This Omega Speedmaster Moonwatch features a white dial, and comes with its full set of accessories, including boxes, papers, warranty card, pictogram card, Master Chronometer card, and extra links.

  • Condition: Overall mint condition
  • Set included: 2025 full set
  • Extra links: 1
Posted at
Apr 23, 2026, 12:06 AM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster “From the Moon to Mars” 3577.50.00

Omega Speedmaster “From the Moon to Mars” 3577.50.00

Omega - 3577.50.00 · $6,299
A unique twist on the classic Omega Speedmaster Moonwatch, featuring a manual-wind movement and subdials representing Earth, the Moon, and Mars.

  • Condition: Excellent, original condition
  • Case size: 42mm diameter
  • Movement: Manual wind (Cal. 1861)
  • Crystal: Hesalite
Posted at
Apr 22, 2026, 10:36 PM
Active
View listing on r/WatchExchange
[WTS] 🚀🌗Brand New 2026 Full Set - Omega Speedmaster Moonphase Reference: 304.30.44.52.01.001 🚀🌗

🚀🌗Brand New 2026 Full Set - Omega Speedmaster Moonphase Reference: 304.30.44.52.01.001 🚀🌗

Omega - 304.30.44.52.01.001 · $11,750
The Omega Speedmaster Moonphase is a brand new, full set model from 2026.

  • Condition: Brand New
  • Msrp: 13000
  • Shipping: fully insured to nearest FedEx Office for signature pickup
Posted at
Apr 22, 2026, 10:30 PM
Active
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[WTS] OMEGA SPEEDMASTER DATE 3513.50 WITH PAPERS

OMEGA SPEEDMASTER DATE 3513.50 WITH PAPERS

Omega - 3513.50 · $1,750
A lightly worn Omega Speedmaster Date with a dated card, extra link, and no box.

  • Condition: lightly worn
  • Diameter: 40mm
Posted at
Apr 22, 2026, 8:47 PM
Active
View listing on r/WatchExchange
[WTS] 2026 Omega Speedmaster Moonwatch Professional 42mm Steel 310.30.42.50.01.001 Full Set

2026 Omega Speedmaster Moonwatch Professional 42mm Steel 310.30.42.50.01.001 Full Set

Omega - 310.30.42.50.01.001 · $6,050
2026 Omega Speedmaster Moonwatch Professional, a stainless steel manual wind watch with black dial and hesalite crystal.

  • Condition: Excellent preowned condition with some light scratches.
  • Case dimensions: 42mm
  • Movement type: Manual Wind, Mechanical
Posted at
Apr 22, 2026, 7:54 PM
Active
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[wts] 2023 OMEGA SPEEDMASTER PROFESSIONAL 310.30.42.50.01.002 $6499

2023 OMEGA SPEEDMASTER PROFESSIONAL 310.30.42.50.01.002 $6499

OMEGA - 310.30.42.50.01.002 · $6,499
2023 OMEGA SPEEDMASTER PROFESSIONAL with manual wind movement and sapphire crystal. Features a 42mm case size and 50 hour power reserve.

  • Condition: Pre owned, cosmetic condition 9/10
  • Case size: 42mm diameter
  • Bracelet: tapered stainless steel with micro adjustments
  • Movement: manual wind 3861
Posted at
Apr 22, 2026, 7:15 PM
Active
View listing on r/WatchExchange
[WTS] 2021 OMEGA SPEEDMASTER PROFESSIONAL 310.30.42.50.01.002

2021 OMEGA SPEEDMASTER PROFESSIONAL 310.30.42.50.01.002

OMEGA - 310.30.42.50.01.002 · $5,799
2021 OMEGA SPEEDMASTER PROFESSIONAL features a manual wind movement, 50 hour power reserve, and 42mm case size. It also comes with a sapphire crystal and 50 meters water resistance.

  • Condition: Pre owned, cosmetic condition 7/10
  • Case size: 42mm diameter
  • Bracelet material: tapered stainless steel
  • Movement: manual wind 3861
Posted at
Apr 22, 2026, 6:32 PM
Active
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[WTS] Omega Speedmaster Professional "Sapphire Sandwich" (Ref. 310.30.42.50.01.002)/Full set

Omega Speedmaster Professional "Sapphire Sandwich" (Ref. 310.30.42.50.01.002)/Full set

Omega - 310.30.42.50.01.002 · $6,000
This Omega Speedmaster Professional, also known as the Sapphire Sandwich, is a manual-wind watch with a Master Chronometer movement and features a stunning Caliber 3861 movement visible through an exhibition caseback.

  • Condition: pristine
  • Purchase Price: 9000
  • Dimensions: 42mm diameter, 20mm lug width
  • Bracelet Type: tapered
Posted at
Apr 22, 2026, 3:53 PM
Active
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[WTS] 3510.50 Omega Reduced Speedmaster Excellent vintage condition with original warranty card Serviced recently

3510.50 Omega Reduced Speedmaster Excellent vintage condition with original warranty card Serviced recently

Omega - 3510.50 · $3,300
This is a 26-year-old Omega Reduced Speedmaster in excellent vintage condition, with original warranty card and recently serviced movement.

  • Condition: Excellent vintage condition
  • Warranty card: Original warranty card included
  • Movement serviced: Recently serviced movement
Posted at
Apr 22, 2026, 1:49 PM
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